Sensory Stimulation Quotes

As long as we lean on anything outside ourselves for support, we are going to be insecure. Most of us try to find support by leaning on all sorts of things - gold, books, learning, sensory stimulation - and if these things are taken away, we fall over. To the extent that we are dependent on these external supports, we grow weaker and more liable to upsets and misfortune.

High stimulation is both exciting and confusing for people with ADHD, because they can get overwhelmed and overstimulated easily without realizing they are approaching that point.

At the most elementary level of information processing, stimulation is energy, and my brain needed to be protected, and isolated from obnoxious sensory stimulation, which it perceived as noise.

Stay at the center of your being without allowing your attention to become distracted by sensory stimulation. Be still and let your true nature manifest and shine through.

You respond to sensory stimulation with the makings of an action— never completed—appropriate to what's happening and how you feel about it. And then you read your own response so as to get a mental picture of it.

If you want to see philosophy in action, pay a visit to a robo-rat laboratory. A robo-rat is a run-ofthe-mill rat with a twist: scientists have implanted electrodes into the sensory and reward areas in the rat’s brain. This enables the scientists to manoeuvre the rat by remote control. After short training sessions, researchers have managed not only to make the rats turn left or right, but also to climb ladders, sniff around garbage piles, and do things that rats normally dislike, such as jumping from great heights. Armies and corporations show keen interest in the robo-rats, hoping they could prove useful in many tasks and situations. For example, robo-rats could help detect survivors trapped under collapsed buildings, locate bombs and booby traps, and map underground tunnels and caves. Animal-welfare activists have voiced concern about the suffering such experiments inflict on the rats. Professor Sanjiv Talwar of the State University of New York, one of the leading robo-rat researchers, has dismissed these concerns, arguing that the rats actually enjoy the experiments. After all, explains Talwar, the rats ‘work for pleasure’ and when the electrodes stimulate the reward centre in their brain, ‘the rat feels Nirvana’. To the best of our understanding, the rat doesn’t feel that somebody else controls her, and she doesn’t feel that she is being coerced to do something against her will. When Professor Talwar presses the remote control, the rat wants to move to the left, which is why she moves to the left. When the professor presses another switch, the rat wants to climb a ladder, which is why she climbs the ladder. After all, the rat’s desires are nothing but a pattern of firing neurons. What does it matter whether the neurons are firing because they are stimulated by other neurons, or because they are stimulated by transplanted electrodes connected to Professor Talwar’s remote control? If you asked the rat about it, she might well have told you, ‘Sure I have free will! Look, I want to turn left – and I turn left. I want to climb a ladder – and I climb a ladder. Doesn’t that prove that I have free will?

[Patricia Highsmith] was overwhelmed by sensory stimulation - there were too many people and too much noise and she just could not handle the supermarket. She continually jumped, afraid that someone might recognise or touch her. She could not make the simplest of decisions - which type of bread did she want, or what kind of salami? I tried to do the shopping as quickly as possible, but at the check-out she started to panic. She took out her wallet, knocked off her glasses, dropped the money on the floor, stuff was going all over the place.

Why has pachinko swept Japan? It can hardly be the excitement of gambling, since the risks and rewards are so small. During the hours spent in front of a pachinko machine, there is an almost total lack of stimulation other than the occasional rush of ball bearings. There is no thought, no movement; you have no control over the flow of balls, apart from holding a little lever which shoots them up to the top of the machine; you sit there enveloped in a cloud of heavy cigarette smoke, semi-dazed by the racket of millions of ball bearings falling through machines around you. Pachinko verges on sensory deprivation. It is the ultimate mental numbing, the final victory of the educational system." - Lost Japan, Eng. vers., 1996

The worst thing one can do for a hyperactive child is to put him or her in front of a television set. Television activates the child at the same time that it cuts the child (or adult) off from real sensory stimulation and the opportunity for resolution.

Attentional amplification of sensory awareness in any sensory medium is achieved by top-down signals from prefrontal cortex that modulate activity of single neurons in sensory brain areas in the absence of any sensory stimulation and significantly increase baseline activity in the corresponding target region.

Approximately 15 to 20 percent of the population has a nervous system wired to be more sensitive. These people are more attuned to the subtleties of their environment and process that information much more deeply compared to others without this trait. While being more observant might be a survival advantage, it can also be overwhelming. Someone who is constantly aware of the subtleties of the environment and of the people around them can quickly experience sensory overload. My clients who consider themselves to be HSPs [highly sensitive persons] often report experiencing a certain type of disorganized attachment because the world itself is too much. Due to their increased sensitivity, even normal everyday events can feel too intense, too chaotic or too stimulating, leaving little respite to feel settled, safe and secure. In relationships, HSPs are often unclear as to whether what they are feeling has its origin in themselves or if their partner's feelings are creating that 'one foot on the gas, one foot on the brake' experience in their nervous system. They want to be close to people, but being close can be a sensory assault that is confusing or that dysregulates them for days.

How can two mutually exclusive behaviors—mating and fighting—be mediated by the same population of neurons? Anderson found that the difference hinges on the intensity of the stimulus applied. Weak sensory stimulation, such as foreplay, activates mating, whereas stronger stimulation, such as danger, activates aggression. In 1952 Meyer Schapiro paid

Though there is a spectrum of sensitivity that exists in human beings, empaths are emotional sponges who absorb both the stress and joy of the world. We feel everything, often to an extreme, and have little guard up between others and ourselves. As a result, we are often overwhelmed by excessive stimulation and are prone to exhaustion and sensory overload.

Every waking moment, our brains and bodies assimilate a myriad of sensory stimulation from the environment, as well as images, thoughts, emotions, body sensations, and movements from our internal state. In a millisecond, through operations so complex that they elude the full understanding of even the most brilliant minds, our brains compare this wealth of current data to memories of past experience. The most critical purpose of this comparison is to predict the next moment with sufficient accuracy so that we can make an adaptive physical action (Llinas, 2001). What we expect to happen in the very next instant determines the immediate action we make, whether it is reaching out to another person or for an object, such as a cup of tea.

Where do we find happiness? Unfortunately, the common belief with most people is that happiness is something that happens to them when conditions are just right rather than something that happens through them when they choose to make space for it. While outer conditions may stimulate the feeling of happiness, it can never come from anywhere other than within us. Authentic happiness isn't something we can go out and get, buy, borrow, or steal. Nor can any form of artificial sensory stimulus generate true happiness; it's only something we can be, and it's a choice we make with every breath we take.

Modulation and processing of the range of sensory experiences allows for social engagement and attachment to others. A person who is easily overwhelmed by sounds, touch, movement, or visual stimulation may avoid interactions with persons or situations that are highly stimulating. In contrast, the person who does not process sensory input unless it is very intense may develop a pattern of thrill seeking, high stimulation, and risky behavior.

The state of waking sleep, therefore, is a condition in which you unconsciously deprive yourself of the expansive vistas of sensory experience. Your sensory receptors become prematurely, but not irrevocably, dull simply because you aren't stimulating them enough.

People don’t come to know the world exclusively through their senses; rather, their affective states influence the processing of sensory stimulation from the very moment an object is encountered.”6 A vital aspect of any object’s meaning resides in the feelings it evokes of pleasure, distress, admiration, confusion. For example, depending on its emotional importance or salience, a viewer may perceive an object as closer or more distant. And this psychobiological feeling is a creature of the past, of expectation, of having learned to read the world.

You know what kind of nerves are in your feet? The same ones that network into your genitals. Your feet are like a minnow bucket full of sensory neurons, all of them wriggling around in search of sensation. Stimulate those nerves just a little, and the impulse will rocket through your entire nervous system; that’s why tickling your feet can overload the switchboard and cause your whole body to spasm.

When looking at the brains of injured patients, Paul Broca (1824–1880) discovered that the left temporal cortex was responsible for speech. When Penfield electrically stimulated the brains of patients undergoing surgery, he confirmed the function of speech was in the left temporal lobe. We know that the motor cortex lies at the front of the brain in a strip along the midline. Sensory processing from the skin lies just to the back of the

The world just reflects your own feelings back at you. Reality is neutral. Reality has no judgments. To a tree, there is no concept of right or wrong, good or bad. You’re born, you have a whole set of sensory experiences and stimulations (lights, colors, and sounds), and then you die. How you choose to interpret them is up to you—you have that choice. This is what I mean when I say happiness is a choice. If you believe it’s a choice, you can start working on it. [77]

brain researcher Arash Javanbakht notes . . . In a world where we are simultaneously bombarded with a great deal of stimulation, we learn to focus our attention on important stimuli, while filtering out (gating) less relevant stimuli. Sensory gating (SG) is a way of habituation to repetitious and unimportant stimuli for the brain to reserve its limited resources to focus on important stimuli that need processing.3 It helps us focus on what we have determined, through experience, schooling, and cultural habituation, to be important.

Bodily delight is a sensory experience, not any different from pure looking or the feeling with which a beautiful fruit fills the tongue; it is a great, an infinite learning that is given to us, a knowledge of the world, the fullness and the splendor of all knowledge. And it is not our acceptance of it that is bad; what is bad is that most people misuse this learning and squander it and apply it as a stimulant on the tired places of their lives and as a distraction rather than as a way of gathering themselves for their highest moments.

My soul mate on this journey has been Orson. He brought me here. He stand with me here. Dogs are emotive, affectionate, and stimulating far beyond the capacity of the brightest-colored fish. A life with dogs - since the are animals, not human - is always an encounter with nature, no matter where it occurs, one that quite frequently connects us to our pasts. They're simple creatures, but they provide sensory diversity, opportunities for discovery and imagination, both connection and solitude - they are certainly radioactive jewels of memory.

Nobel laureate Eric Kandel, M.D., showed that when new memories are formed, the number of synaptic connections in the sensory neurons that are stimulated doubles, to 2,600. However, unless the original learning experience is repeated over and over again, the number of new connections falls back to the original 1,300 in a matter of only three weeks. Therefore, if we repeat what we learn enough times, we strengthen communities of neurons to support us in remembering it the next time. If we don’t, then the synaptic connections soon disappear and the memory is erased.

After all, across the population there are slight differences in brain function, and sometimes these translate directly into different ways of experiencing the world. And each individual believes his way is reality. To get a sense of this, imagine a world of magenta Tuesdays, tastes that have shapes, and wavy green symphonies. One in a hundred otherwise normal people experience the world this way, because of a condition called synesthesia (meaning “joined sensation”).5 In synesthetes, stimulation of a sense triggers an anomalous sensory experience: one may hear colors, taste shapes, or systematically experience other sensory blendings. For example, a voice or music may not only be heard but also seen, tasted, or felt as a touch. Synesthesia is a fusion of different sensory perceptions: the feel of sandpaper might evoke an F-sharp, the taste of chicken might be accompanied by a feeling of pinpoints on the fingertips, or a symphony might be experienced in blues and golds. Synesthetes are so accustomed to the effects that they are surprised to find that others do not share their experiences. These synesthetic experiences are not abnormal in any pathological sense; they are simply unusual in a statistical sense.

My general philosophy regarding endurance contains four key points: 1. Build a great aerobic base. This essential physical and metabolic foundation helps accomplish several important tasks: it prevents injury and maintains a balanced physical body; it increases fat burning for improved stamina, weight loss, and sustained energy; and it improves overall health in the immune and hormonal systems, the intestines and liver, and throughout the body. 2. Eat well. Specific foods influence the developing aerobic system, especially the foods consumed in the course of a typical day. Overall, diet can significantly influence your body’s physical, chemical, and mental state of fitness and health. 3. Reduce stress. Training and competition, combined with other lifestyle factors, can be stressful and adversely affect performance, cause injuries, and even lead to poor nutrition because they can disrupt the normal digestion and absorption of nutrients. 4. Improve brain function. The brain and entire nervous system control virtually all athletic activity, and a healthier brain produces a better athlete. Improved brain function occurs from eating well, controlling stress, and through sensory stimulation, which includes proper training and optimal breathing.

Doubting free will is not just a philosophical exercise. It has practical implications. If organisms indeed lack free will, it implies we could manipulate and even control their desires using drugs, genetic engineering or direct brain stimulation. If you want to see philosophy in action, pay a visit to a robo-rat laboratory. A robo-rat is a run-of-the-mill rat with a twist: scientists have implanted electrodes into the sensory and reward areas in the rat’s brain. This enables the scientists to manoeuvre the rat by remote control. After short training sessions, researchers have managed not only to make the rats turn left or right, but also to climb ladders, sniff around garbage piles, and do things that rats normally dislike, such as jumping from great heights.

Practical affairs task the human brain throughout the day. At night, the mind takes a deserved hiatus to consider the impossible and the absurd. In the carnage of our nighttime sleep tussles, the colored liqueurs of the true, the possible, fantasy, and the mythic beliefs become intermixed. Eyelets of the commonsensical and the imaginative are incorporated, and a new realism emerges out of our distilled perception of the veridical derived from the phenomenal realm of sensory reality and the philosophic world of ideals contained in the noumenal realm. The resultant psychobiologic vision immerses us in bouts of intoxicating inspiration and artistic stimulation and leaves us rickety boned and weakened after enduring a dreaded hangover of perpetual doubt laced with vagueness and insecurity.

You and I are learning to see our trait as a neutral thing—useful in some situations, not in others—but our culture definitely does not see it, or any trait as neutral. The anthropologist Margaret Mead explained it well. Although a culture’s newborns will show a broad range of inherited temperaments, only a narrow band of these, a certain type, will be the ideal. The ideal personality is embodied, in Mead's words, in 'every thread of the social fabric—in the care of the young child, the games the children play, the songs the people sing, the political organization, the religious observance, the art and the philosophy.' Other traits are ignored, discouraged, or if all else fails, ridiculed. What is the ideal in our culture? Movies, advertisements, the design of public spaces, all tell us we should be as tough as the Terminator, as stoic as Clint Eastwood, as outgoing as Goldie Hawn. We should be pleasantly stimulated by bright lights, noise, a gang of cheerful fellows hanging out in a bar. If we are feeling overwhelmed and sensitive, we can always take a painkiller.

neurophysiologist Olaf Blanke, who came across the phenomenon unexpectedly. He had triggered it with electrical stimulation to the temporal parietal cortex of a patient’s brain while trying to locate the focus of a seizure.8 He has also studied a bevy of patients who complain of an FoP. He found that lesions in the frontoparietal area are specifically associated with the phenomenon and are on the opposite side of the body from the presence.9 This location suggested to him that disturbances in sensorimotor processing and multisensory integration may be responsible. While we are conscious of our location in space, we are unaware of the multitude of processes (vision, sound, touch, proprioception, motor movement, etc.) that, when normally integrated, properly locate us there. If there is a disorder in the processing, errors can occur and our brains can misinterpret our location. Blanke and his colleagues have found that one such error manifests itself as an FoP. Recently, they cleverly induced the FoP in healthy subjects by disordering their sensory processing with the help of a robotic arm.10

You need to make sure you always have a reserve of willpower available for the on-the-fly decision making and controlling your reactions. If you run your willpower tank too low, you’ll end up making poor choices or exploding at people. The following are some ways of making more willpower available to you: --Reduce the number of tasks you attempt to get done each day to a very small number. Always identify what your most important task is, and make sure you get that single task done. You can group together your trivial tasks, like replying to emails or paying bills online, and count those as just one item. --Refresh your available willpower by doing tasks slowly. My friend Toni Bernhard, author of How to Wake Up: A Buddhist-Inspired Guide to Navigating Joy and Sorrow, recommends doing a task 25% slower than your usual speed. I’m not saying you need to do this all the time, just when you feel scattered or overwhelmed. Slowing down in this way is considered a form of mindfulness practice. --Another way to refresh your willpower is by taking some slow breaths or doing any of the mindfulness practices from Chapter 5. Think of using mindfulness as running a cleanup on background processes that haven’t shut down correctly. By using mindfulness to do a cognitive cleanup, you’re not leaking mental energy to background worries and rumination. --Reduce decision making. For many people, especially those in management positions or raising kids, life involves constant decision making. Decision making leeches willpower. Find whatever ways you can to reduce decision making without it feeling like a sacrifice. Set up routines (like which meals you cook on particular nights of the week) that prevent you from needing to remake the same decisions over and over. Alternatively, outsource decision making to someone else whenever possible. Let other people make decisions to take them off your plate. --Reduce excess sensory stimulation. For example, close the door or put on some dorky giant headphones to block out noise. This will mean your mental processing power isn’t getting used up by having to filter out excess stimulation. This tip is especially important if you are a highly sensitive person.

As information processing machines, our ability to process data about the external world begins at the level of sensory perception. Although most of us are rarely aware of it, our sensory receptors are designed to detect information at the energy level. Because everything around us - the air we breathe, even the materials we use to build with, are composed of spinning and vibrating atomic particles, you and I are literally swimming in a turbulent sea of electromagnetic fields. We are part of it. We are enveloped within in, and through our sensory apparatus we experience what is. Each of our sensory systems is made up of a complex cascade of neurons that process the incoming neural code from the level of the receptor to specific areas within the brain. Each group of neurons along the cascade alters or enhances the code, and passes it on to the next set of cells in the system, which further defines and refines the message. By the time the code reaches the outermost portion of our brain, the higher levels of the cerebral cortex, we become conscious of the stimulation. However, if any of the cells along the pathway fail in their ability to function normally, then the final perception is skewed away from normal reality.

Nobel laureate Richard Feynman, always curious about new phenomena, once placed himself in a sensory deprivation tank and tried to leave his physical body. He was successful. He would later write that he felt that he had left his body, drifted into space, and saw his motionless body when he looked back. However, Feynman later concluded that this was probably just his imagination, caused by sensory deprivation. Neurologists who have studied this phenomenon have a more prosaic explanation. Dr. Olaf Blanke and his colleagues in Switzerland may have located the precise place in the brain that generates out-of-body experiences. One of his patients was a forty-three-year-old woman who suffered from debilitating seizures that came from her right temporal lobe. A grid of about one hundred electrodes was placed over her brain in order to locate the region responsible for her seizures. When the electrodes stimulated the area between the parietal and temporal lobes, she immediately had the sensation of leaving her body. “I see myself lying in bed, from above, but I only see my legs and lower trunk!” she exclaimed. She felt she was floating six feet above her body. When the electrodes were turned off, however, the out-of-body sensation disappeared immediately. In fact, Dr. Blanke found that he could turn the out-of-body sensation on and off, like a light switch, by repeatedly stimulating this area of the brain. As we saw in Chapter 9, temporal lobe epileptic lesions can induce the feeling that there are evil spirits behind every misfortune, so the concept of spirits leaving the body is perhaps part of our neural makeup. (This may also explain the presence of supernatural beings. When Dr. Blanke analyzed a twenty-two-year-old woman who was suffering from intractable seizures, he found that, by stimulating the temporoparietal area of the brain, he could induce the sensation that there was a shadowy presence behind her. She could describe this person, who even grabbed her arms, in detail. His position would change with each appearance, but he would always appear behind her.)

Our senses give us the information we need to function in the world. Their first job is to help us survive. Their second job, after they assure us that we are safe, is to help us learn how to be active, social creatures. The senses receive information from stimuli both outside and inside our bodies. Every move we make, every bite we eat, every object we touch produces sensations. When we engage in any activity, we use several senses at the same time. The convergence of sensations—especially touch, body position, movement, sight, sound, and smell—is called intersensory integration. This process is key and tells us on the spot what is going on, where, why, and when it matters, and how we must use or respond to it. The more important the activity, the more senses we use. That is why we use all our senses simultaneously for two very important human activities: eating and procreating. Sometimes our senses inform us that something in our environment doesn’t feel right; we sense that we are in danger and so we respond defensively. For instance, should we feel a tarantula creeping down our neck, we would protect ourselves with a fight-or-flight response. Withdrawing from too much stimulation or from stimulation of the wrong kind is natural. Sometimes our senses inform us that all is well; we feel safe and satisfied and seek more of the same stimuli. For example, we are so pleased with the taste of one chocolate-covered raisin that we eat a handful. Sometimes, when we get bored, we go looking for more stimulation. For example, when we have mastered a skill, like ice skating in a straight line, we attempt a more complicated move, like a figure eight. To do their job well, so that we respond appropriately, the senses must work together. A well-balanced brain that is nourished with many sensations operates well, and when our brain operates smoothly, so do we. We have more senses than many people realize. Some sensations occur outside our bodies, and some inside.

Perceptual motor therapy provides integrated movement experiences that remediate gross-motor, fine-motor, and visual discrimination problems. Activities, including sensory-input techniques, stimulate left/right brain communication to help the child interpret incoming information to the nervous system. Goals are to develop more mature patterns of response to specific stimuli, improve motor skills and balance, and stimulate alternate routes to memory and sequencing for those children who do not respond to the methods taught in the conventional classroom.

Activities to Develop the Vestibular System Rolling—Encourage your child to roll across the floor and down a grassy hill. Swinging—Encourage (but never force) the child to swing. Gentle, linear movement is calming. Fast, high swinging in an arc is more stimulating. If the child has gravitational insecurity, start him on a low swing so his feet can touch the ground, or hold him on your lap. Two adults can swing him in a blanket, too. Spinning—At the playground, let the child spin on the tire swing or merry-go-round. Indoors, offer a swivel chair or Sit ’n Spin. Monitor the spinning, as the child may become easily overstimulated. Don’t spin her without her permission! Sliding—How many ways can a child swoosh down a slide? Sitting up, lying down, frontwards, backwards, holding on to the sides, not holding on, with legs straddling the sides, etc. Riding Vehicles—Trikes, bikes, and scooters help children improve their balance, motor planning, and motor coordination. Walking on Unstable Surfaces—A sandy beach, a playground “clatter bridge,” a grassy meadow, and a waterbed are examples of shaky ground that require children to adjust their bodies as they move. Rocking—Provide a rocking chair for your child to get energized, organized, or tranquilized.

The vestibular system tells us about up and down and whether we are upright or not. It tells us where our heads and bodies are in relation to the earth’s surface. It sends sensory messages about balance and movement from the neck, eyes, and body to the CNS for processing and then helps generate muscle tone so we can move smoothly and efficiently. This sense tells us whether we are moving or standing still, and whether objects are moving or motionless in relation to our body. It also informs us what direction we are going in, and how fast we are going. This is extremely useful information should we need to make a fast getaway! Indeed, the fundamental functions of fight, flight, and foraging for food depend on accurate information from the vestibular system. Dr. Ayres writes that the “system has basic survival value at one of the most primitive levels, and such significance is reflected in its role in sensory integration.” The receptors for vestibular sensations are hair cells in the inner ear, which is like a “vestibule” for sensory messages to pass through. The inner-ear receptors work something like a carpenter’s level. They register every movement we make and every change in head position—even the most subtle. Some inner-ear structures receive information about where our head and body are in space when we are motionless, or move slowly, or tilt our head in any linear direction—forward, backward, or to the side. As an example of how this works, stand up in an ordinary biped, or two-footed, position. Now, close your eyes and tip your head way to the right. With your eyes closed, resume your upright posture. Open your eyes. Are you upright again, where you want to be? Your vestibular system did its job. Other structures in the inner ear receive information about the direction and speed of our head and body when we move rapidly in space, on the diagonal or in circles. Stand up and turn around in a circle or two. Do you feel a little dizzy? You should. Your vestibular system tells you instantly when you have had enough of this rotary stimulation. You will probably regain your balance in a moment. What stimulates these inner ear receptors? Gravity! According to Dr. Ayres, gravity is “the most constant and universal force in our lives.” It rules every move we make. Throughout evolution, we have been refining our responses to gravitational pull. Our ancient ancestors, the first fish, developed gravity receptors, on either side of their heads, for three purposes: 1) to keep upright, 2) to provide a sense of their own motions so they could move efficiently, and 3) to detect potentially threatening movements of other creatures through the vibrations of ripples in the water. Millions of years later, we still have gravity receptors to serve the same purposes—except now vibrations come through air rather than water.

An occupational therapist will usually evaluate the child in her office. The evaluation is ordinarily a pleasant experience. While costs vary, expect to spend several hundred dollars. This will be money well spent, and it may be covered by health insurance. Here are some of the areas an OT investigates: Fine- and gross-motor developmental levels Visual-motor integration (doing puzzles or copying shapes) Visual discrimination Neuromuscular control (balance and posture) Responses to sensory stimulation (tactile, vestibular, and proprioceptive) Bilateral coordination Praxis (motor planning)

It is within this network of intermediary neurons, arranged end-to-end and side-by-side between our sensory nerve endings and our motor units, that all of our tone levels, reflexes, gestures, habits, tendencies, feelings, attitudes, postures, styles have their genesis. It is called the internuncial net, and it has come into its fullest flower in the human being. [Internuncios were official messengers for the Pope, taking information and bringing back responses from the various courts of Europe.) This net composes roughly ninety percent of our nervous systems, including the entire spinal cord and the brain. It is nothing less than the total activity of this internuncial net which influences the responses of the motor units. Let us recall our stiff old man who was anaesthetized for surgery. The anaesthesia had no direct effect on either sensory endings or motor units; rather, it interrupted the normal flow of signals in the internuncial network in the brain. The result was flaccid, unresponsive muscles, and a blanking out of all sensation produced by the scalpel and the probe. It is only by influencing the flow of impulses through the vast internuncial net that we can have any effect upon tone, habit, and behavior. The conditions which direct that flow into specific patterns have been evolved through the handling of particular qualities and amounts of sensory experience and the repetitions of specific appropriate motor responses. One of the readiest means we have of actually influencing—rather than just temporarily interrupting—the conditions within the net is the introduction of more and more positive sensory experience, which elicits new kinds of motor responses, and can thus form the basis for the development of new habits, new conditions, new patterns of neural flow. The complexities of the internuncial net are forbidding. The suggestion that bodywork might in some way make significant and lasting changes in its function may sound like the ravings of a necromancer turned amateur neurosurgeon. We know so very little, and would presume to do so much. And yet we do know that very simple means can produce remarkable and demonstrably repeatable results in this fantastically complicated network. Infants who do not receive adequate physical stimulation die or are dwarfed and deformed. Laboratory rats who are handled on a daily basis develop markedly stronger resistance to fatal diseases, even to the loss of vital organs. Between these two extremes is a wide spectrum of quantity and quality of touching, all of which must certainly affect the health of the organism if touch in the orphanage and in the laboratory can be proven to be so crucial.

And yet what a potentially dangerous device, what a terrible opportunity to bury valuable, even vital sensory information beneath the fears and prejudices and suppressions of the higher brain! We absolutely must exercise constant discrimination upon the steady barrage of sensations if they are to take on any meaningful form and direct sequential activities; but what bizarre, even ghastly shapes this discrimination is free to invent. Attitudes, moods, neuroses, fixations, and avoidances of all kinds contribute to the sensitivity of the ascending sensory pathways themselves, so that minor irritations can be magnified to overwhelming proportions, pleasures can be erased or actually turned into torments, serious internal difficulties can be blotted completely out of consciousness. The principle of selectivity is crucial to organized behavior, but the possibilities for its abuse are enormous. The mind is capable of distorting incoming information to almost any degree, and it can actually construct a body image that has very little to do with the bulk of sensory data which the body is providing. These two directions of sensory transmission are both occurring all the time, and we cannot say that our idea of reality is more clearly established by one than by the other. Or, if we have to make a choice, we must admit that it is the descending, centrifugal sensory current that is the more important one: We all receive stimulation from the same external world through identical sensory devices, but it is the process of selection and interpretation which makes us respond differently, makes each of us the unique individuals that we are. In this process, discriminating mind descends into and is active in every synapse of the sensory system. The two processes of transmitting data through the nervous system and of interpreting it cannot be separated. Information is processed at each synaptic level of the afferent pathways. There is no one point along the afferent pathways or one particular level beneath the central nervous system below which activity cannot be a conscious sensation and above which it is a recognizable, defineable sensory experience. Perception has many levels, and it seems that the many separate stages are arranged in a hierarchy, with the more complex stages receiving input only after they are processed by the more elementary systems.13 And the more elementary systems are in turn facilitated or inhibited by the higher, more complex ones. The conclusions towards which these observations push us seems unequivocal. The cognitive, associational processes of the higher brain have just as much to do with our construction of physical reality—both within us and outside of us—as do our sensory devices and their specific stimulations. And remember, it is the perception of this sensory reality which initiates and directs our motor responses, our postures, and our behavior.

The pathways with axons pointed towards the core, and which carry impulses inward, are called the afferent pathways. They originate in the various sensory endings of the body—the exteroceptors on the surface, the proprioceptors in the connective tissues (especially the joints), and the interoceptors in the the internal organs. Their final axons terminate in the sensory cortex. They are often referred to as the sensory pathways. Their job is to carry to all the levels of the nervous system information about everything that is affecting the organism—that is, all sensory stimulation. Four of these afferent pathways are short and distinct, arising from the highly localized and specialized areas of the “special senses”—sight, hearing, taste, and smell. The fifth kind of sensory information, that wide array of sensations we refer to collectively as “touch,” converges on the cortex from virtually every surface and cranny of the body. These are the “somatic senses,” and they include all of the pathways and endings which inform us of our internal state of affairs and our relationship to the outside world. The afferent, inflowing pathways of the nervous system constitute one of the principal tools of bodywork. It is by their means that surface contact and pressure enter into the deeper strata of the mind, where genetic potential and sensory experience are fused into behavior and character. Each successive afferent neuron is a finger reaching deeper and deeper into the interior, making its influence felt on all levels which influence behavior. It is sensory input which has conditioned our reflexes, postures, and habits into the patterns in which we find ourselves living. Nothing would seem to be more reasonable than the expectation that different sensory input can recondition these habits and patterns, alter them, improve them. This input can be different both in the sense of being more, giving additional nutritive contact to the various subtle degrees of “deprivation dwarfism,” and in the sense of being more pleasurable, more caring, softening and dissolving compulsive patterns that have been created by pain and stress.

Because the efferent pathways lead directly to muscle cells, it is tempting to regard their activities as the cause of our motor behavior. But they are nothing of the kind until they are themselves stimulated by their numerous connections with the spinal cord and the brain (remember that an estimated fifteen thousand axons can converge upon a single terminal motor neuron). And these deeper, more central activities are in turn initiated and directed to a large degree by afferent, sensory stimulation. In bodywork, it is often problematical aberrations of motor response that we want to change, but sensory affects are our only means of doing so. We know we are doing our job when our hands feel jumpy reflexes smoothing out, high levels of tone decreasing, pliability returning to stiffened areas, range of motion increasing. These are all quantitative and qualitative shifts in motor activity. But we also must know that it is only our skilled manipulation of sensory stimulation which can accomplish these things, because it is primarily sensory associations which have conditioned the muscular patterns in the first place. Until the body feels something different, it cannot act differently. Only when contact with the world is perceived as something other than jabs and buffets can the organism respond with something other than aggression and defense.

• Inattention: Perhaps because of sensory over- or underresponsiveness, the child may have a short attention span, even for activities he enjoys. He may be highly distractible, paying attention to everything except the task at hand. He may be disorganized and forgetful. • Impulsivity: To get or avoid sensory stimulation, the child may be heedlessly energetic and impetuous. She may lack self-control and be unable to stop after starting an activity. She may pour juice until it spills, run pell-mell into people, overturn toy bins, and talk out of turn.

Sensory Processing Disorder is difficulty in the way the brain takes in, organizes and uses sensory information, causing a person to have problems interacting effectively in the everyday environment. Sensory stimulation may cause difficulty in one’s movement, emotions, attention, or adaptive responses. SPD is an umbrella term covering several distinct disorders that affect how the child uses his senses. Having SPD does not imply brain damage or disease, but rather what Dr. Ayres called “indigestion of the brain,” or a “traffic jam in the brain.” Here is what may happen: • The child’s CNS may not receive or detect sensory information. • The brain may not integrate, modulate, organize, and discriminate sensory messages efficiently. • The disorganized brain may send out inaccurate messages to direct the child’s actions. Deprived of the accurate feedback he needs to behave in a purposeful way, he may have problems in looking and listening, paying attention, interacting with people and objects, processing new information, remembering, and learning.

These descending sensory pathways originate in the cortex, and their influence can either inhibit or facilitate the sensory input from any area of the body, greatly amplify or suppress altogether any given sensation. Sensory activity within the central nervous system is a Janus head, a two-way stream; signals originating in the brain have just as much to do with conscious sensation as do actual stimulations of the peripheral nerve endings. In fact, it is the descending paths which determine the sensitivity of any particular ascending pathway. The wide varieties of sexual response—among different individuals and within the same individual at different times—provide us with a clear example of this centrifugal influence upon incoming sensations: Depending upon past experiences and the present situation, the same stimulation of the genitals can produce intense ecstasy, bland and neutral sensations, or extreme discomfort. Orgasm can be immediate, or deferred indefinitely. And the imagination alone can produce constant engorgement, utter impotence, and all the degrees of arousal in between. The descending paths can color all kinds of sensory input to this degree. These pathways allow the mind to determine the active threshold for different sensory signals, and make it possible to focus attention upon a single source of input in the midst of many. It is difficult to imagine what practical use our sensory apparatus would be to us without such a mechanism. We would have no way of selecting a voice from all the other sounds around us, of locating specific objects within the swirl of visual impressions, or of retiring from our senses for contemplation and sleep. This centrifugal principle of selectivity is as vital to our appropriate responses to the world as is stimulation itself.

The Golgi organs themselves are multi-branched type endings of sensory axons, which are woven among the collagen fibers near the muscle cells, and which are stimulated by the straightening and recoiling of the tendon. As is the case with the muscle spindles, the stimulation of a single tendon organ is highly specific: Each particular organ is most directly affected by the lengthening and contracting of the few alpha muscle fibers which attach to the collagen bundles containing that tendon organ, so that each Golgi is responsive to the activities of only ten to fifteen alpha motor units.

Like the spinal cord, many of the brain stem’s interconnections are “hard-wired,” and their stimulation initiates obligatory responses that are not unlike those of the spinal reflex arcs. It is these relatively fixed pathways and responses which control the range of behavior and style of movement that are so characteristic of each species; a cat and a small dog have pretty much the same skeletal and muscular structure, yet each moves this structure about in ways which clearly identify it as canine or feline. These distinctly different styles of moving similar physical frames are the result of different patterns of integrating sensory information and of organizing motor commands, primarily in the spinal cord and in the older, “reptilian” portion of the brain—that is, the centers of gamma motor control.

The level of activity in this reticular formation reflects an individual’s general state of arousal. Artificial over-stimulation of the entire area does not result in limb-flailing or the exaggeration of particular gestures; instead, it causes a stiffened tetany in all the muscles of the body simultaneously. Everything locks rigidly into place and cannot be moved until stimulation recedes. Conversely, blocking stimulation from reaching the whole area results in a general loss of muscle tone throughout the body, as in our anaesthetized patient. That is, activity in this area as a whole does not command our muscles to produce any particular gesture or assume any particular posture. Rather, general activity here provides the conditions of general muscle tone, sensory awareness, and mental alertness which will support and color whatever postures and gestures are made. The reticular formation cannot issue the command “raise right arm,” but it does help to establish the trembling tension, the calm readiness, or the sluggishness which will characterize how I raise my arm in response to a situation. To direct these general levels of arousal into particular movements requires the next level of the “old” brain, the basal ganglia—the highest level of sensory and motor organization of the gamma motor system.

In the globus pallidus, all of this sensory information is sifted and selected so that we can appropriately brace some parts of our bodies in order to support the desired movement in other parts. For instance, the back, shoulder, and arm must be suitably braced in order for the fingers to successfully manipulate a pencil on a page. These phenomena of “fixation” seem to be the elements added to coordinated movement by the globus pallidus. If a laboratory animal is electrically stimulated in this ganglion, it will become fixed in whatever position it had achieved at the onset of the stimulation, and it will remain fixed in that position until the stimulation ceases. The possible varieties of these fixations are endless, enabling us to brace all parts of our bodies in any shape the anatomy will allow. Without them, the violinist could not hold his instrument, the marksman could not steady his rifle, the artist could not hold his arm straight to daub the canvas, the host could not pour coffee from the pot. Typically, of course, we do not continue to explore the innumerable fixations of which we are capable. Our habits, our jobs, our social situations, our general dispositions all tend to urge us to prefer certain fixed positions over others. For each of us, our characteristic posture is nothing but a particular fixation to which we return again and again, until the idea that we might in fact stand up in a different way passes out of our conscious consideration.

We now know that a movement may be initiated by either of these two motor systems. The motor cortex can initiate a voluntary movement without being blocked by the stretch reflex, because when I know that I am going to move in a specific way, then the critical “unexpected” quality of stretching muscle lengths is neutralized. The unconscious gamma command centers in my brain stem can mimic a move directed by my conscious mind, lengthening and shortening its intrafusal cells in concert with the alpha cells around them so that the anulospiral sensory element is not stretched or collapsed during the movement. In this instance, the gamma system follows the lead of the alpha, with the anulospiral ending’s reflex arc silenced as long as the two are synchronized—that is, as long as the alpha movements correspond to “expected” limits that are successfully mimicked by gamma movements. A movement may be initiated by the gamma motor system as well. In this case, the command signals are organized in the terminal gamma ganglia in the brain stem (the gamma system’s counterpart for the alpha’s cerebral cortex). These signals are then sent through a complicated path known as the gamma loop: They descend through gamma motor neurons out to the intrafusal fibers. These small spindle cells are not strong enough to move a limb, but they are strong enough to stretch their own anulospiral receptors. This stretch automatically fires the spinal reflex arcs connected with the receptors, and the larger alpha motor cells are immediately stimulated to match the contractions of the gamma fibers. As soon as the desired muscle length has been reached, the commands from the brain stem cease, and the spindles hold their new resting length. When the alpha fibers catch up to this new resting length (a matter of a fraction of a second), the anulospiral element is quieted, and contraction ceases.

So it is necessary that we have a means of monitoring the tension developed by muscular activity, and equally necessary that the threshold of response for the inhibitory function of that monitor be a variable threshold that can be readily adjusted to suit many purposes, from preventing tissue damage due to overload, to providing a smooth and delicate twist of the tuning knob of a sensitive shortwave receiver. And such a marvelously adaptable tension-feedback system we do have in our Golgi tendon organs, reflex arcs which connect the sensory events in a stretching tendon directly to the motor events which control that degree of stretch, neural feed-back loops whose degree of sensory and motor stimulation may be widely altered according to our intent, our conscious training, and our unconscious habits. This ingenious device does, however, contain a singular danger, a danger unfortunately inherent in the very features of the Golgi reflex which are the cleverest, and the most indispensable to its proper function. The degree of facilitation of the feed-back loop, which sets the threshold value for the “required tension,” is controlled by descending impulses from higher brain centers down into the loop’s internuncial network in the brain stem and the spinal cord. In this way, conscious judgements and the fruits of practice are translated into precise neuromuscular values. But judgement and practice are not the only factors that can be involved in this facilitating higher brain activity. Relative levels of overall arousal, our attitudes towards our past experience, the quality of our present mood, neurotic avoidances and compulsions of all kinds, emotional associations from all quarters—any of these things can color descending messages, and do in fact cause considerable alterations in the Golgi’s threshold values. It is possible, for instance, to be so emotionally involved in an effort—either through panic or through exhilaration—that we do not even notice that our exertions have torn us internally until the excitement has receded, leaving the painful injury behind to surprise us. Or acute anxiety may drive the value of the “required tension” so high that our knuckles whiten as we grip the steering wheel, the pencil suddenly snaps in our fingers, or the glass shatters as we set it with too much force onto the table. On the other hand, timidity or the fear of being rejected can so sap us of “required tension” that it is difficult for us to produce a loud, clear knock upon a door that we tremble to enter.

These two primary reflex arcs—the spindle and the Golgi—are the principal sensory devices which the nervous system uses for the enormously complicated task of maintaining and adjusting the appropriate levels of muscle tone throughout the body. The normal tone of a muscle is dependent upon the simple stretch reflex, through which the the sensory endings in a muscle, stimulated by even the slightest stretching of the muscle, initiate a segmental reflex increasing muscle tone.11 The muscle spindle, whose associated reflex arc tends to excite alpha motor neurons and their motor units, is complimented by the Golgi tendon organ, whose reflex arc tends to inhibit the same alpha neurons and motor units. Between the two of them, they produce a summation of excitation and inhibition on the alpha neurons which keeps the active muscle fibers within a narrow range of tensional forces—just the right amount to stand, to lift a book, to hold a glass. Now the problem of maintaining this precision is such a complex one not only because there are so many muscle cells in the body to monitor, but also because proper muscle tone must accomplish so many different things. It must be able to shift its various tensional values in the various parts of the musculature back and forth so rapidly in order to do all of my muscular tasks competently.

The sensory axon that ends in the anulospiral receptor reaches out from its cell body located in the spinal cord. This cell body synapses with its own spinal sensory tracts which carry the spindles’ sensory information up each segment of the spinal column and finally to the brain, much like the orderly, parallel spinal tracts for the skin receptors, the joint receptors, and so on. But in addition to joining together in its own sensory stream like all other sensory nerves headed for the brain, the cell bodies of the anulospiral receptors make another interesting connection within the spinal column. They synapse directly to the body of a motor nerve as well, and to precisely the motor nerve which stimulates the skeletal muscle cells that surround the corresponding spindle. This means that the terminal motor nerve, the one which directly excites the muscle cells of the skeletal motor unit, can be excited not only by motor commands from the brain, but can also be excited by a sensory signal from the muscle spindle surrounded by the muscle cells of the same skeletal motor unit. 7-7: A simple spindle reflex arc. A single afferent nerve forms the anulospiral receptor at one end and synapses directly to a motor nerve at the other end, in the spinal column. This motor nerve in turn synapses to muscle cells in the immediate vicinity of the spindle, creating a very sensitive local feedback loop. This sensory-to-motor synapse in the spinal cord forms a reflex arc, the most direct linkage we have between local sensory events and local motor response. Activity in specific muscle cells creates a local sensory impulse which directly effects the subsequent activity of the same muscle cells. Thus the reflex arc constitutes a feedback loop which both keeps my muscles themselves constantly informed as to what they are up to, and constantly modifies their efforts. And most of this feedback takes place in the spinal cord, far below my levels of conscious awareness, and far more rapidly than I could consciously command it.

It is this heightened state that may produce several relatively new phenomena in childhood today. As the clinical psychologist Catherine Steiner-Adair,10 the author of The Big Disconnect: Protecting Childhood and Family Relationships in the Digital Age, observes, the most commonly heard complaint when children are asked to go off-line is “I’m bored.” Confronted with the dazzling possibilities for their attention on a nearby screen, young children quickly become awash with, then accustomed to, and ever so gradually semi-addicted to continuous sensory stimulation. When the constant level of stimulation is taken away, the children respond predictably with a seemingly overwhelming state of boredom. “I’m Bored.” There are different kinds of boredom. There is a natural boredom that is part of the woof of childhood that can often provide children with the impetus to create their own forms of entertainment and just plain fun. This is the boredom that Walter Benjamin described years ago as the “dream bird that hatches the egg of experience.”11 But there may also be an unnatural, culturally induced, new form of boredom that follows too much digital stimulation. This form of boredom may de-animate children in such a fashion as to prevent them from wanting to explore and create real-world experiences for themselves, particularly outside their rooms, houses, and schools. As Steiner-Adair wrote, “If they become addicted to playing on screens,12 children will not know how to move through that fugue state they call boredom, which is often a necessary prelude to creativity.” It would be an intellectual shame to think that in the spirit of giving our children as much as we can through the many creative offerings of the latest, enhanced e-books and technological innovations, we may inadvertently deprive them of the motivation and time necessary to build their own images of what is read and to construct their own imaginative off-line worlds that are the invisible habitats of childhood. Such cautions are neither a matter of nostalgic lament nor an exclusion of the powerful, exciting uses of the child’s imagination fostered by technology. We will return to such uses a little later. Nor should worries over a “lost childhood” be dismissed as a cultural (read Western) luxury. What of the real lost childhoods? one might ask, in which the daily struggle to survive trumps everything else? Those children are never far from my thoughts or my work every day of my life.

To give your baby the best chance of developing optimally, use loving touch as a means of bonding and early sensory stimulation

South America is known as a “high contact” culture, meaning that residents stand closer to one another, touch one another more and are accustomed to more sensory stimulation than residents in, say, northern Europe, with Australians and North Americans believed to be more moderate in their cultural contact level.

Understanding the Sensory-Motor Cortex The next stage revolves around scanning your body mentally. Have you ever watched a documentary demonstrating what happens when a person’s brain matter is carefully stimulated with probes? What happens is that physical movements and feelings occur as a result of the probing. For instance, one area being probed causes a physical movement somewhere in the body, whereas another might bring on laughter or tears. This is an expression of the brain-body connection. Yoga’s Ayurvedic healers figured this out ages ago, but instead of stimulating the brain with probes to cause a bodily reaction, the opposite was done. They brilliantly realized that mentally scanning the body in a particular way affects the brain positively. The nerve pathways between the body and brain become clear and are strengthened, facilitating deeply healing relaxation.

The cortex, that is, is as subject to remapping through attention as it is through the changes in sensory input described in our survey of neuroplasticity. In addition, in all three of the cortical systems where scientists have documented neuroplasticity—the primary auditory cortex, somatosensory cortex, and motor cortex—the variable determining whether or not the brain changes is not the sensory input itself but, crucially, the attentional state of the animal. In 1993 Merzenich showed that passive stimulation alone simply did not cut it. He and his students repeatedly exposed monkeys to specific sound frequencies. When the monkeys were trained to pay attention, the result was the expected tonotopic reorganization of the auditory cortex: the representation of the repeatedly heard frequency expanded. But when the monkeys were distracted by another task, and so were paying little or no attention to the tones piped into their ears, no such tonotopic expansion occurred. Inputs that the monkey does not pay attention to fail to produce long-term cortical changes; closely attended behaviors and inputs do. Let me repeat: when stimuli identical to those that induce plastic changes in an attending brain are instead delivered to a nonattending brain, there is no induction of cortical plasticity. Attention, in other words, must be paid.

The world just reflects your own feelings back at you. Reality is neutral. Reality has no judgments. To a tree, there is no concept of right or wrong, good or bad. You’re born, you have a whole set of sensory experiences and stimulations (lights, colors, and sounds), and then you die. How you choose to interpret them is up to you—you have that choice.

So also with the effect of set on perception (perceptual set is another aspect of the phase sequence, closely related to attention). It has been shown that in certain circumstances one sees what one expects, or is set, to see. But this is no general rule, else one would be incapable of seeing the unexpected. When a stimulation is sufficiently strong or distinctive from its background, and familiar or composed of familiar parts, it will be capable of initiating its own phase sequence, regardless of what other phase sequence may be going on at the moment. (If the new phase sequence is incompatible with the pre-existing one, startle or emotion may result.) The sensory event is capable of taking control of central action, just as in other circumstances the central action is capable of reinforcing one sensory event at the expense of a second.

When something interesting activates the dopamine system, we snap to attention. If we are able to activate our H&N system by shifting our focus outward, the increased level of attention makes the sensory experience more intense. Imagine walking down a street in a foreign country. Everything is more exciting, even looking at ordinary buildings, trees, and shops. Because we are in a novel situation, sensory inputs are more vivid. That’s a large part of the joy of travel. It works in the opposite direction, too. Experiencing H&N sensory stimulation, especially within a complex environment (sometimes called an enriched environment), makes the dopaminergic cognitive facilities in our brains work better. The most complex environments, those that are most enriched, are usually natural ones.

Neurodivergent Checklist Time Blindness: Many neurodivergent people have trouble properly perceiving time as it passes. It either goes by too quickly or slowly. The perception of time depends on the level of stimulation the neurodivergent person is dealing with. It also can vary depending on what you’re focused on. If you’ve ever found yourself unable to account for time, you may be neurodivergent. Executive Dysfunction: This is what you experience when you want to accomplish a task, but despite how hard you try, you cannot see it through. Executive dysfunction happens for various reasons, depending on the type of neurodivergence in question. Still, the point is that this is a common occurrence in neurodivergent people. Task Multiplication: What is task multiplication? It happens when you set off to accomplish one thing but have to do a million other things, even though that wasn’t your original plan. For instance, you may want to sit down to finish some writing, only to notice water on the floor. You get up to grab a mop, and on the way, you notice the laundry you were supposed to drop off at the dry cleaners. Stooping to pick up the bag, you find yourself at eye level with your journal and remember you were supposed to make an entry the previous day, so you’re going to do that now. On and on it goes. Inconsistent Sleep Habits: This depends on what sort of neurodivergence you’re dealing with and if you’ve got comorbid disorders. Most importantly, neurodivergent people sleep more or less than “regular” people. You may also notice that your sleep habits fluctuate a lot. Sometimes you may sleep for eight hours at a stretch for a week, only to suddenly start running on just three hours of sleep. Emotional Dysregulation: With many neurodivergent people, it’s hard to keep emotions in check. Emotional dysregulation occurs in extreme emotions, sudden mood swings, or inappropriate emotional reactions (either not responding to the degree they should or overreacting). Hyperfixation: This also plays out differently depending on the brand of neurodivergence in question. Often, neurodivergent people get very involved in topics or hobbies to the point of what others may think of as obsession. Picking Up on Subtleties but Missing the Obvious: Neurodivergent people may struggle with picking up on things neurotypical people can see easily. At the same time, they are incredibly adept at noticing the subtle things everyone else misses. Sensory Sensitivities: If you’re neurodivergent, you may be unable to ignore your clothes tag scratching your back, have trouble hearing certain sounds, and can’t quite deal with certain textures of clothing, food, and so on. Rejection Sensitivity: Neurodivergent people are often more sensitive to rejection than others due to neurological differences and life experiences. For instance, children with ADHD get much more negative feedback than their peers without ADHD. Neurodivergent people are often rejected to the point where they notice rejection even when it’s not there.

Synesthesia is a unique sensory phenomenon that affects less than ten percent of the world’s population. A person with synesthesia—or “joined perception”—often experiences multiple sensory responses when only one sense has been stimulated. Many creative people experience this comingling of senses: the painter Kandinsky saw colors when he listened to music, and the musician Billie Eilish reports a wide array of synesthetic experiences that include color, sound, texture, and temperature.

Each man is given a scientific heritage plus a continuing barrage of sensory stimulation; and the considerations which guide him in warping his scientific heritage to fit his continuing sensory promptings are, where rational, pragmatic.

For example, the visual cortex would engage layers and layers of neurons to turn pixels of retinal stimulation into recognizable images before it can scream to the amygdala, “It’s a gun!” Importantly, some sensory information entering the brain takes a shortcut, bypassing the cortex and going directly to the amygdala. Thus the amygdala can be informed about something scary before the cortex has a clue.

that, instead of being fused to the skull, hangs loosely beneath the brain case. This enables the upper jaw to push forward and hyperextend open—wide enough to engulf, and crush, an adult bull elephant. As if the size and voraciousness of its feeding orifice were not enough, nature has endowed this monster with a predatory intelligence, honed by 400 million years of evolution. Six distinct senses expose every geological feature, every current, every temperature gradient … and every creature occupying its domain. The predator’s eyes contain a reflective layer of tissue situated behind the retina. When moving through the darkness of the depths, light is reflected off this layer, allowing the creature to see. In sunlight, the reflective plate is covered by a layer of pigment, which functions like a built-in pair of sunglasses. While black in normally pigmented members of the species, this particular male’s eyes are a cataract-blue—a trait found in albinos. As large as basketballs, the sight organs reflexively roll back into the skull as the creature launches its attack on its prey, protecting the eyeball from being damaged. Forward of the eyes, just beneath the snout, are a pair of directional nostrils so sensitive that they can detect one drop of blood or urine in a million gallons of water. The tongue and snout provide a sense of taste and touch, while two labyrinths within the skull function as ears. But it is two other receptor organs that make this predator the master of its liquid domain. The first of these mid-to-long-range detection systems is the lateral line, a hollow tube that runs along either flank just beneath the skin. Microscopic pores open these tubes to the sea. When another animal creates a vibration or turbulence in the water, the reverberations stimulate tiny hairs within these sensory cells that alert the predator to the source of the disturbance—miles away! Even more sensitive are the hunter’s long-range receptor cells, located along the top and underside

brain-friendly training uses the following five general elements to enhance learning: 1. Positive emotional experiences 2. Multi-sensory stimulation and novelty 3. Instructional variety and choices 4. Active participation and collaboration 5. Informal learning environments

Richard commented on the ecstasy of cycling through foreign lands and how both hiker and cyclist were able to enjoy the aromas and sounds of the countryside far, far more than those touring by car or bus who, literally, suffer sensory deprivation. Cycling has an advantage even over hiking: the scenery changes at a more stimulating pace, yet not so fast that one does not have time to savour it. And at cruising speed one creates one’s own cooling breeze. Cycling, said Harvey, is the one form of wheeled transport that cannot in any way be regarded as offensive – no pollution, no noise, little demand on road space.

In the traditionally taught view of perception, data from the sensorium pours into the brain, works its way up the sensory hierarchy, and makes itself seen, heard, smelled, tasted, felt—“perceived.” But a closer examination of the data suggests this is incorrect. The brain is properly thought of as a mostly closed system that runs on its own internally generated activity. We already have many examples of this sort of activity: for example, breathing, digestion, and walking are controlled by autonomously running activity generators in your brain stem and spinal cord. During dream sleep the brain is isolated from its normal input, so internal activation is the only source of cortical stimulation. In the awake state, internal activity is the basis for imagination and hallucinations.

So as soon as you think a new thought, you become changed—neurologically, chemically, and genetically. In fact, you can gain thousands of new connections in a matter of seconds from novel learning, new ways of thinking, and fresh experiences. This means that by thought alone, you can personally activate new genes right away. It happens just by changing your mind; it’s mind over matter. Nobel laureate Eric Kandel, M.D., showed that when new memories are formed, the number of synaptic connections in the sensory neurons that are stimulated doubles, to 2,600. However, unless the original learning experience is repeated over and over again, the number of new connections falls back to the original 1,300 in a matter of only three weeks. Therefore,

Red: Most yang, warm, and stimulating. Produces heat. Stimulates vital energy and circulation of the blood. Stimulates sensory nervous systems and energizes the five basic senses. Stimulates the healing of wounds without pus. Used in treatment of chronic infections. Too much red leads to anger and hyperactivity. Orange: Gentle yang, tonifies. Stimulates appetite, relieves cramps and spasms, increases blood pressure, induces vomiting, relieves gas, builds bones. When used with blue, regulates the endocrine system. Stimulates joy, optimism, and enthusiasm. Yellow: Yang, and the brightest of all colors. Strengthens motor nervous system and metabolism, and aids conditions of the glandular, lymphatic, and digestive systems. Stimulates intellectual functions; boosts cheerfulness and confidence. Green: Neutral yin. Slightly cooling. Treats conditions of the lungs, eyes, diabetes, musculoskeletal and inflammatory joint problems, and ulcers. Is antibacterial and aids in detoxification. Calms, soothes, and balances. Blue: Yin or cool. Relaxes body and mind, reduces fever, congestion, itching, irritation, and pain. Treats high blood pressure, burns, inflammations with pus and diseases involving heat. Contracts tissues and muscles. Calms and tranquilizes when used on the pituitary and pineal acupoints. Helpful for insomnia, phobias, and endocrine imbalances. Not indicated for depression as it is a melancholy color. Violet: Most yin color. Aids the spleen, reduces irritability, and balances the right brain. When combined with yellow, increases lymph production, controls hunger, and balances the nervous system. Acts on the unconscious.35 Complementary Colors The complementary color pairs are: red-green, orange-blue, and yellow-violet. Together, these colors balance yin and yang. For example, red might stimulate the blood and improve circulation while green calms conditions creating stress. Blue might assuage pain while orange lifts fear or depression causing tension. Yellow will strengthen the nervous system while violet calms it with a meditative state.

Direct brain implants will allow users to enter full-immersion virtual reality—with complete sensory stimulation—without any external equipment. The use of direct brain implants in the brain’s frontal lobe(essentially behind the forehead) was seen by the Apostle John 2000 years ago. “It also forced all people, great and small, rich and poor, free and slave, to receive a mark on their right hands or on their foreheads, so that they could not buy or sell unless they had the mark, which is the name of the beast or the number of its name.” Revelation 13:16-17 (NIV)

The point is that past impressions do get stimulated, even old ones, and they affect your life. Sensory inputs from today’s events dig through all the stuff you have stored through the years, and they restore the exact past patterns associated with the incoming events.

See, back in the 70s, the CIA experimented with all sorts of torture. Forced interrogation methods and stuff. Anything to get prisoners talking, spilling the goods. We’re talking water-boarding, tight confinement, sleep deprivation, pumping them full of LSD. Anything that anyone could dream up. One thing they tried was extreme sensory deprivation. They’d lock people in pitch-black, silent rooms. Days, weeks, or even months on end. Psychologically, it’s devastating. Without sensory stimulation, the brain just goes haywire.

Tips for Play Turn it off Turn off the TV and the electronics! Imagination is an essential ingredient for play to have its positive effects. Create an enriching environment Studies show that a sensory-rich environment coupled with play facilitates cortical growth in the brain. Having a variety of materials around that can stimulate all of the senses—visual, auditory, tactile, and so on—enhances brain development during play. Use art Children’s brains grow when they make art. Therefore, don’t show them how to do it—just put out the art supplies and let them create spontaneously. Let them explore outside Get them outside as much as possible to play in nature—the woods, the park, the beach, wherever. Try to find safe areas where you aren’t afraid to let them be free and explore the environment. These are places they can really use their imaginations and have fun. Mix children of different ages

I define responsibility (response-ability) as the ability to choose how we respond to stimulation coming in through our sensory systems at any moment in time. Although there are certain limbic system (emotional) programs that can be triggered automatically, it takes less than 90 seconds for one of these programs to be triggered, surge through our body, and then be completely flushed out of our blood stream. My anger response, for example, is a programmed response that can be set off automatically. Once triggered, the chemical released by my brain surges through my body and I have a physiological experi-ence. Within 90 seconds from the initial trigger, the chemical component of my anger has completely dissipated from my blood and my automatic response is over. If, however, I remain angry after those 90 seconds have passed, then it is because I have chosen to let that circuit continue to run. Moment by moment, I make the choice to either hook into my neurocircuitry or move back into the present moment, allowing that reaction to melt away as fleeting physiology.

The child may be a Highly Sensitive Person (HSP) or have a challenging health condition. While disorganized attachment is often associated with parental abuse and neglect, this isn’t always the case. Certain traits or experiences specific to the child can also prompt a disorganized experience. Approximately 15 to 20 percent of the population has a nervous system wired to be more sensitive. These people are more attuned to the subtleties of their environment and process that information much more deeply compared to others without this trait.28 While being more observant might be a survival advantage, it can also be overwhelming. Someone who is constantly aware of the subtleties of the environment and of the people around them can quickly experience sensory overload. My clients who consider themselves to be HSPs often report experiencing a certain type of disorganized attachment because the world itself is too much. Due to their increased sensitivity, even normal everyday events can feel too intense, too chaotic or too stimulating, leaving little respite to feel settled, safe and secure. In relationships, HSPs are often unclear as to whether what they are feeling has its origin in themselves or if their partner’s feelings are creating that “one foot on the gas, one foot on the brake” experience in their nervous system. They want to be close to people, but being close can be a sensory assault that is confusing or that dysregulates them for days.

Animals under early domestication received shelter, a diet altered by agriculture, and protection from predators through relative confinement. This reduced their sensory needs, facilitating further domestication. As our domesticated animals settled in for a life of reduced activity and stimulation, so did humans. As people provided safer, more sedentary conditions for their livestock, they did the same for themselves. The confinement was mutual. By moving out of nature and settling onto farms, we became in a real sense just another farm animal.

Happiness to me is mainly not suffering, not desiring, not thinking too much about the future or the past, really embracing the present moment and the reality of what is, and the way it is. [4] If you ever want to have peace in your life, you have to move beyond good and evil. Nature has no concept of happiness or unhappiness. Nature follows unbroken mathematical laws and a chain of cause and effect from the Big Bang to now. Everything is perfect exactly the way it is. It is only in our particular minds we are unhappy or not happy, and things are perfect or imperfect because of what we desire. [4] The world just reflects your own feelings back at you. Reality is neutral. Reality has no judgments. To a tree, there is no concept of right or wrong, good or bad. You’re born, you have a whole set of sensory experiences and stimulations (lights, colors, and sounds), and then you die. How you choose to interpret them is up to you—you have that choice. This is what I mean when I say happiness is a choice. If you believe it’s a choice, you can start working on it. [77] There are no external forces affecting your emotions—as much as it may feel that way. I’ve also come to believe in the complete and utter insignificance of the self, and I think that helps a lot. For example, if you thought you were the most important thing in the Universe, then you would have to bend the entire Universe to your will. If you’re the most important thing in the Universe, then how could it not conform to your desires. If it doesn’t conform to your desires, something is wrong. However, if you view yourself as a bacteria or an amoeba—or if you view all of your works as writing on water or building castles in the sand, then you have no expectation for how life should “actually” be. Life is just the way it is. When you accept that, you have no cause to be happy or unhappy. Those things almost don’t apply. Happiness is what’s there when you remove the sense that something is missing in your life.

That’s not necessarily bad—until it becomes so pleasing and engaging to the brain that we begin to prefer it to other less-stimulating, less-busy sensory input. An infant or toddler consumed by a screen is missing out on other critical forms of learning about the world. They should be exploring what things feel like, smell like, taste like. They should be making sense of their world using all their sensory tools.

OM CHANTING Various studies have shown that OM chanting deactivates the limbic part of the brain responsible for our basic emotions (fear, pleasure, anger) and our impulses (hunger, sex, dominance and care of offspring). Since the effectiveness of OM chanting is associated with the experience of vibrations around the ears, scientists have suggested that these sensations are transmitted through the auricular branch of the vagus nerve. As the vagus nerve branches off into the inner ear and larynx, controlling the opening and closing of the vocal cords and tone of the sound, it appears that this is stimulated during the vocalization of the O and M sounds. In addition, by performing chanting in exhalation, the vagus nerve is activated in its role as manager of the parasympathetic system. In addition, chanting, by facilitating the lengthening of the exhalation, further amplifies the effect on the parasympathetic system. This is why this practice helps to calm and relax the body and mind. -Find a quiet place to sit comfortably. -A good position is to sit with your legs crossed and your back straight. -Wear comfortable cotton clothes that do not tighten any part of your body. All body channels should be free and comfortable. Place the palm of your right hand (facing upwards) on the palm of your left hand at navel level. Close your eyes for a few minutes and relax your mind and body. Slowly feel the vibrations that occur in every part of your body. When the vibrations become more intense, start breathing deeply. Hold your breath for a second and then slowly exhale. Initially count to 7 as you exhale. This ought to be duplicated thrice. As you exhale the third time, sing "oooooooooo..." Feel the vibrations in your abdomen (and under your chest). After exhaling, relax for 2 seconds. Breathe in again (slow, deep breaths). As you exhale sing "ooooo..." and feel the vibrations in your chest and neck. After exhaling, relax for 2 seconds. Inhale again (long, deep breath). As you exhale, sing "mmmmmmmm...". Feel the vibrations in your head and neck. After exhaling, relax for 2 seconds. Inhale again and as you exhale say "oooommmm..." or "aaauuummm...". About 80% of the sound should be "aaauuu..." and 20% should be "mmmm...". Repeat the previous steps 3 times (you can do it up to 9 times). After the Om meditation, relax and concentrate on your regular breathing for about 5 minutes. TIPS -Wearing white clothes and being in a white environment will improve your experience. But the rule of white is not fundamental. -A good place could be a quiet room or a garden with shade. Your eyes, ears or other sensory organs should not be disturbed. -Do not consume alcohol for at least 8-10 hours before meditation. -It would be better not to eat or drink anything for at least 2 hours before meditation. The body's channels should not be blocked in order to achieve maximum results. This applies especially to the digestive system. -The best times for this meditation are early in the morning or late at night. -For beginners, singing "aum" can cause dizziness. It is recommended to proceed slowly and try to learn one step at a time. In this way you will prepare body and mind for the next step. -It is very important to open your eyes slowly when your breathing has stabilized. -If you cannot sit on the floor, you can try sitting on a bed or a chair. The most important thing is to keep your back straight. -Doing this kind of meditation in a group brings more peace and harmony to all members than doing it alone.

What if we have become virtually addicted to the heightened sensory stimulation that composes much of our daily lives and cannot stop ourselves from pursuing it incessantly, as Judith Shulevitz suggests in6 The Sabbath World: Glimpses of a Different Order of Time and as technology experts in “persuasion design” principles know very well?

When a parent finds it difficult to connect with their autistic child and receives no, low or unexpected feedback, they may modify their style of interacting with the child and become more directive[ci][cii][ciii] or hyper-stimulating[civ]. In such a scenario, the parent’s vocal pitch may rise and their prosody alter, their facial expression may become exaggerated, they may enter further and more frequently into their child’s personal space and may become more physical, energetic and vocal in their interactions with the child. For an autistic infant experiencing sensory trauma, such modifications in parental interaction style, inspired by the parent’s desire to connect, may paradoxically make it even more difficult, if not impossible, for the infant to connect with their parent.

Thus the nerve may be taken to be a relay with essentially two states of activity: firing and repose. Leaving aside those neurons which accept their messages from free endings or sensory end organs, each neuron has its message fed into it by other neurons at points of contact known as synapses. For a given outgoing neuron, these vary in number from a very few to many hundred. It is the state of the incoming impulses at the various synapses, combined with the antecedent state of the outgoing neuron itself, which determines whether it will fire or not. If it is neither firing nor refractory, and the number of incoming synapses which “fire” within a certain very short fusion interval of time exceeds a certain threshold, then the neuron will fire after a known, fairly constant synaptic delay. This is perhaps an oversimplification of the picture: the “threshold” may not depend simply on the number of synapses but on their “weight” and their geometrical relations to one another with respect to the neuron into which they feed; and there is very convincing evidence that there exist synapses of a different nature, the so-called “inhibitory synapses,” which either completely prevent the firing of the outgoing neuron or at any rate raise its threshold with respect to stimulation at the ordinary synapses. What is pretty clear, however, is that some definite combinations of impulses on the incoming neurons having synaptic connections with a given neuron will cause it to fire, while others will not cause it to fire. This is not to say that there may not be other, non-neuronic influences, perhaps of a humoral nature, which produce slow, secular changes tending to vary that pattern of incoming impulses which is adequate for firing.

And this brought me back to the problem of the localization of a percept. The fundamental idea of the theory as it was later published (Hebb, 1949) was that repeated exposure to a given sensory stimulation will organize an assembly, and the difficulty I have already referred to now became inescapable. A familiar object is recognizable at different distances, at different angles, and in different parts of the visual field—left, right, above or below the direction of vision. In each case, the retinal stimulation is different and so a different cortical excitation results. In each case, it seemed, a separate assembly would be required, amounting to a large number for each recognizable object and meaning that visual recognition would have to be separately learned for each direction, distance, and aspect of the object as seen. An improbable conclusion, to say the least. Regretfully, I saw that the idea would not work. It was too interesting to give up entirely, but I could not take it seriously. The

What is sensory integration therapy? This form of occupational therapy helps children and adults with SPD (sensory processing disorder) use all their senses together. These are the senses of touch, taste, smell, sight, and hearing. Sensory integration therapy is claimed to help people with SPD respond to sensory inputs such as light, sound, touch, and others; and change challenging or repetitive behaviours. Someone in the family may have trouble receiving and responding to information through their senses. This is a condition called sensory processing disorder (SPD). These people are over-sensitive to things in their surroundings. This disorder is commonly identified in children and with conditions like autism spectrum disorder. The exact cause of sensory processing disorder is yet to be identified. However, previous studies have proven that over-sensitivity to light and sound has a strong genetic component. Other studies say that those with sensory processing conditions have abnormal brain activity when exposed simultaneously to light and sound. Treatment for sensory processing disorder in children and adults is called sensory integration therapy. Therapy sessions are play-oriented for children, so they should be fun and playful. This may include the use of swings, slides, and trampolines and may be able to calm an anxious child. In addition, children can make appropriate responses. They can also perform more normally. SPD can also affect adults Someone who struggles with SPD should consider receiving occupational therapy, which has an important role in identifying and treating sensory integration issues. Occupational therapists are health professionals using different therapeutic approaches so that people can do every work they need to do, inside and outside their homes. Through occupational therapy, affected individuals are helped to manage their immediate and long-term sensory symptoms. Sensory integration therapy for adults, especially for people living with dementia or Alzheimer's disease, may use everyday sounds, objects, foods, and other items to rouse their feelings and elicit positive responses. Suppose an adult is experiencing agitation or anxiety. In that case, soothing music can calm them, or smelling a scent familiar to them can help lessen their nervous excitement and encourage relaxation, as these things can stimulate their senses. Seniors with Alzheimer's/Dementia can regain their ability to connect with the world around them. This can help improve their well-being overall and quality of life. What Are The Benefits of Sensory Integration Therapy Sensory integration treatment offers several benefits to people with SPD: * efficient organisation of sensory information. These are the things the brain collects from one's senses - smell, touch, sight, etc. * Active involvement in an exploration of the environment. * Maximised ability to function in recreational and other daily activities. * Improved independence with daily living activities. * Improved performance in the home, school, and community. * self-regulations. Affected individuals get the ability to understand and manage their behaviours and understand their feelings about things that happen around them. * Sensory systems modulation. If you are searching for an occupational therapist to work with for a family with a sensory processing disorder, check out the Mission Walk Therapy & Rehabilitation Centre. The occupational therapy team of Mission Walk uses individualised care plans, along with the most advanced techniques, so that patients can perform games, school tasks, and other day-to-day activities with their best functional skills. Call Mission Walk today for more information or a free consultation on sensory integration therapy. Our customer service staff will be happy to help.

This is a visualisation aimed at clients who need to relax. The story involves a walk along a cliff path, with sensory stimulation (sights, sounds, smells) for clients to experience in their imagination. They can leave the stresses of everyday life behind and move forward into a more relaxed existence.

Tammet’s memory system is partly based on synesthesia: one type of sensory stimulation evokes the sensation of another, as when the visualization of a number or a letter evokes the visualization of a color or a taste.

There is nothing wrong with attraction, but we are easily carried away by what looks appealing, feels good, or sounds right. In solutude we learn to create space between sensory stimulation and decision-making.

The insula also gives rise to empathy. People who are more sensitive to emotional cues from others have greater insula activation and score higher on tests of empathy. And the insula lights up during meditation sessions, especially when the meditator is feeling kindness and compassion. As the meditator expands his definition of connection to include other people and eventually the entire universe, he feels one with everything. In the words of a comprehensive meditation review, “the habitual reified dualities between subject and object, self and other, in-group and out-group dissipate.” As he expands the borders of his tent to infinity, massive changes occur in his brain activity. Insula Activation Benefits Increases Decreases Elevated emotional states Anger Motor control Fear Kindness Anxiety Compassion Depression Empathy Addiction Longevity Chronic pain Immunity Happiness Love Sensory enjoyment Introspection Sense of fulfillment Feelings of connectedness Focus Self-awareness As well as mediating our empathy and compassion circuits, the insula has several other functions. It collects information from a far-flung network of receptors inside our body as well as from our skin. It then stimulates feelings such as hunger that then prompt actions such as seeking food. The dark side of this mechanism is that it can stimulate cravings for drugs, tobacco, and alcohol. Addicts show increased insula activation even before consuming their drug of choice. The insula also lights up when we feel pain or even anticipate feeling pain. Meditators are more “in the moment” when it comes to physical pain, releasing it more quickly. They may also experience overwhelming cravings, as we’ll see in Chapter 5. These are positive cravings directing them toward the ecstatic states found in Bliss Brain.

When inner guessing completely rules the roost, we are just hallucinating, full stop. But when it is appropriately sensitive to sensory stimulations—via prediction error signals—the guessing is controlled, and the world becomes known to the mind.

It is very important to understand that ultimately, meditation is not about getting anything—meditation is entirely about letting go. In fact, I can summarize my entire twenty-plus years of meditation practice in just two words: letting go. The entirety of my practice is learning to let go. For example, early on, I learned to let go of my addiction to constant sensory and mental stimulation. A bit later on, I learned to let go of restlessness and distraction during sitting meditation. Much later on, I learned to let go of some amount of greed, hatred, anxiety, and destructive ego. And at the current stage of my practice, I’m learning to let go of clinging, aversion, ill will, my dependence on sensory pleasure in general, and my need to fluff up my identity and ego. The entire process is nothing but letting go.

We have seen that a toddler needs to be surrounded to build fixed landmarks in his mind; he needs to move, to discover the environment by himself through the five senses, and he needs to do. All other needs of the toddler are always related to the sensory periods and are: Need for direct contact with the mother; Need to feel protected and safe; Need to develop relationships; Need to find stable reference points; Need its biological rhythms to be respected; Need for self-awareness as an individual; Need for freedom and independence; Need for a tailored space; Need for concentration; Need to use hands; Need to experience nature; Need for silence.

The sensorium and the motorium function as parts of a single order...The eye always places itself in such a way that it receives the richest possible stimulations from the object looked at. Everything takes place as if a law of the maximum regulated the movements of our eyes, as if at each moment these movements were what they should be in order to realize certain situations of preferred equilibrium toward which the forces which are at work in the sensible sector tend. If, in the dark, a luminous spot appears in a marginal zone, everything takes place as if the equilibrium of the sensory-motor system were broken up; from this results a state of tension resolved by the fixation movement which brings the luminous spot to the functional center of the retina. Thus the motor devices appear as the means of re-establishing an equilibrium, the conditions of which are given in the sensory sector of the nervous system; and the movements appear as the external expression of this reorganization of the field of excitations comparable to the settling of objects in a receptacle under the action of weight.

Research with humans has shown that babies are drawn toward sounds and patterns at various stages of development in order to fuel the growth of new neural connections. According to neurobiologist Gene Wallenstein, this behavior is the result of a “pleasure instinct” that motivates the infant to seek out sensory input. This input helps fine-tune the connections between neurons, in a process called synaptic pruning. Think of our brain like a scale that needs to be calibrated before it can accurately measure weight. Because sensory stimulation inside the womb is limited, much of our perceptual capacity must be developed after birth.

The path of an impulse through the nervous system is not linear, from stimulation to sensation to motor response; it is always circular, each motor response in turn providing stimulation which colors the sensations, which alter the subsequent motor responses, and so on and on and on. My own tissues are among the objects that touch my awareness, and my own muscular responses are continually a part of the creation of sensory information about the world that floods my central nervous system. Movement itself is the factor which unites the two halves of my nervous system into a unified relationship of continually mutual reciprosity—“Perception and motor answer are the two sides of the unit behavior.”1

What happened? There's no response. I think you stimulated her too much and she froze. Ah, sensory overload, ok. What do you want me to do? Buzz her and move on to the next. Is that necessary? No, it's efficient.

hours with their eyes closed without worrying if they are actually sleeping. Since 80 percent of sensory stimulation comes in through the eyes, just resting with your eyes closed gives you quite a break.

All of the effort expended in the destructive cycles of PTSD wreaks psychological and physiological havoc. People with PTSD try to compensate for this hyperarousal by shutting down and withdrawing from any kind of stimulation. They use dissociation and a range of mood-altering behaviors—cutting and burning, bingeing and purging, drinking and drugs, sex and starvation—to numb out and regulate their emotions and keep the intrusive memories at bay. Over time, however, they become so numb and withdrawn that "this underresponsiveness leads to a series of changes in the nervous system that are similar to the effects of prolonged sensory deprivation," says van der Kolk.