Famous Neuroscientists Quotes

The question of what a dog is thinking is actually an old metaphysical debate, which has its origins in Descartes’s famous saying cogito ergo sum—“I think, therefore I am.” Our entire human experience exists solely inside our heads. Photons may strike our retinas, but it is only through the activity of our brains that we have the subjective experience of seeing a rainbow or the sublime beauty of a sunset over the ocean. Does a dog see those things? Of course. Do they experience them the same way? Absolutely not.

Political economist and sociologist Max Weber famously spoke of the “disenchantment of the world,” as rationalization and science led Europe and America into modern industrial society, pushing back religion and all “magical” theories about reality. Now we are witnessing the disenchantment of the self. One of the many dangers in this process is that if we remove the magic from our image of ourselves, we may also remove it from our image of others. We could become disenchanted with one another. Our image of Homo sapiens underlies our everyday practice and culture; it shapes the way we treat one another as well as how we subjectively experience ourselves. In Western societies, the Judeo-Christian image of humankind—whether you are a believer or not—has secured a minimal moral consensus in everyday life. It has been a major factor in social cohesion. Now that the neurosciences have irrevocably dissolved the Judeo-Christian image of a human being as containing an immortal spark of the divine, we are beginning to realize that they have not substituted anything that could hold society together and provide a common ground for shared moral intuitions and values. An anthropological and ethical vacuum may well follow on the heels of neuroscientific findings. This is a dangerous situation. One potential scenario is that long before neuroscientists and philosophers have settled any of the perennial issues—for example, the nature of the self, the freedom of the will, the relationship between mind and brain, or what makes a person a person—a vulgar materialism might take hold. More and more people will start telling themselves: “I don’t understand what all these neuroexperts and consciousness philosophers are talking about, but the upshot seems pretty clear to me. The cat is out of the bag: We are gene-copying bio- robots, living out here on a lonely planet in a cold and empty physical universe. We have brains but no immortal souls, and after seventy years or so the curtain drops. There will never be an afterlife, or any kind of reward or punishment for anyone, and ultimately everyone is alone. I get the message, and you had better believe I will adjust my behavior to it. It would probably be smart not to let anybody know I’ve seen through the game.

Benjamin Libet, a scientist in the physiology department of the University of California, San Francisco, was a pioneering researcher into the nature of human consciousness. In one famous experiment he asked a study group to move their hands at a moment of their choosing while their brain activity was being monitored. Libet was seeking to identify what came first — the brain’s electrical activity to make the hand move or the person’s conscious intention to make their hand move. It had to be the second one, surely? But no. Brain activity to move the hand was triggered a full half a second before any conscious intention to move it…. John-Dylan Haynes, a neuroscientist at the Max Planck Institute for Human Cognitive and Brain Studies in Leipzig, Germany, led a later study that was able to predict an action ten seconds before people had a conscious intention to do it. What was all the stuff about free will? Frank Tong, a neuroscientist at Vanderbilt University in Nashville, Tennessee, said: “Ten seconds is a lifetime in terms of brain activity.” So where is it coming from if not ‘us,’ the conscious mind?

In Chennai (Madras), there is bronze gallery in the state museum that houses a magnificent collection of southern Indian bronzes. One of its prize works is a twelfth-century Nataraja (Figure 8.5). One day around the turn of the twentieth century, an elderly firangi (“foreigner” or “white” in Hindi) gentleman was observed gazing at the Nataraja in awe. To the amazement of the museum guards and patrons, he went into a sort of trance and proceeded to mimic the dance postures. A crowd gathered around, but the gentleman seemed oblivious until the curator finally showed up to see what was going on. He almost had the poor man arrested until he realized the European was none other than the world-famous sculptor Auguste Rodin. Rodin was moved to tears by The Dancing Shiva. In his writings he referred to it as one of the greatest works of art ever created by the human mind.

Neuroscientists have observed that several changes in brain function tend to accompany the flow state. The brain’s electrical activity always unfolds in wave patterns. Normal consciousness is associated with a high-frequency beta wave pattern. In the flow state, brain rhythms drop down to the borderline between low-frequency beta and theta waves. Flow is tied also to sharply reduced activity in the prefrontal cortex, the part of the brain that gives rise to a sense of self and that includes the aforementioned dorsolateral prefrontal cortex—the brain’s internal critic. And at the molecular level, several neurotransmitters, or brain messenger chemicals, are released during flow. Among these are norepinephrine, which enhances mental focus, and endorphins, which are the source of the famous “runner’s high.” It is not necessary to measure brain waves or neurotransmitter levels to figure out if an athlete is operating in the flow state. You can just ask. Athletes know when they are in flow because the feeling is unmistakable—it’s that sense of absolute unity with one’s effort that Siri Lindley

To make things more confusing, for most physics equations, time can go in either direction (forward or backwards, +t or -t). This doesn’t really match with our everyday experience, even though the equations work out. Suffice it to say that so far, physicists have not been super helpful in improving our everyday understanding of the flow of time, although they are working hard on it.c What about philosophers? If you think time is completely subjective or mental and does not or cannot exist in the physical world, you are in good company with the likes of John McTaggartd and St Augustine.e In contrast, if you feel that time is both a physical fact as well as a mental experience, you will be in good company with most present-day philosophers, who think of time as the thing that describes how change happens; the thing that we try to measure by using a clock.f That’s not really clear either, but it seems a bit ahead of the physicists – maybe. How about the psychologists and cognitive neuroscientists? Most of them focus their investigations on the mental experience of time as opposed to physical time. People generally agree that there is a kind of order to the events we experience in our lives, which, when put together, we call the flow of time, temporal flow, or the “stream of consciousness” as psychologist William James famously put it.g Many psychologists and neuroscientists studying time and time perception try to understand this mystery by trying to figure out how the mind and brain create a sense of temporal flow.h The subjective sense of temporal flow is all very interesting, but it won’t get us precisely where we want to be, which is to understand how precognition of actual physical future events might actually be possible. Understanding the science of precognition can be thought of as understanding how we might access information about events that occur in the future of our own personal temporal flow, relative to our own personal “now”. This sounds like mental time travel rather than physical time travel, and that is a reasonable way to think about it. It could even be completely accurate. But you can also think about the science of precognition in physical terms, as trying to understand how future physical events can influence past physical events. Either way, when we have premonitions, it feels as if the future is pulling us forward both physically and mentally.

Francis Crick, co-discoverer of the structure of DNA, arguably the greatest discovery in biology in the twentieth century, famously said, “If you want to understand function, study structure.

Despite centuries of investigation by everyone from natural historians, psychologists, and psychiatrists, to ethicists, neuroscientists, and philosophers, there is still no universal definition of emotion or consciousness. As I mentioned earlier, a number of researchers have agreed that animals share the capacity for the emotions of fear and enjoyment. It's highly likely, however, as the neuroscientist Jaak Panksepp suggests, that animals experience many more than these. What, for example, is the bee emotion associated with seeing a particularly pleasing ultraviolet pattern inside a flower? What does the dolphin emotion for sensing a sonar ping from a long-lost companion feel like? The octopus emotion associated with performing a sudden, flushing change of skin color? Other animals have different physiological experiences than we do and those may come with their own emotional experiences. Because of this, it's difficult to make a finite list. There isn't consensus even on the universal human emotions. The psychologist Paul Ekman put forth the most famous list of what he called "basic" human emotions: anger, fear, sadness, enjoyment, disgust, and surprise. But what about excitement, shame, awe, relief, jealousy, love, or joy? Attempting to reduce all of these complex states to a grocery list of experiences may be beside the point, especially since we know how useful they can be.