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GAMMA When you sustain alpha brain waves, several other waves change. High-frequency beta waves, βthe signature waves of stress,β shrink, decreasing in amplitude. Low-frequency waves, theta and delta, grow, increasing in amplitude. 4.21. Gamma are the waves in red at the very top of the screen. When these slow waves increase, the fastest wave, gamma, is produced by the brain. Gamma is the signature wave of the βflowβ state and represents the synchronization of information from many different brain regions. Itβs usually found in highly creative people, as well as ordinary people having a moment of insight. Itβs also observed in states of mystical union. When studying advanced yogis, Davidson found that their brains had 25 times the gamma activity of ordinary people. Gamma is also associated with feelings of love and compassion, increased perceptual organization, associative learning, synaptic efficiency, healing, attention, and states of transcendent bliss. Neuroimaging studies have shown that gamma waves synchronize the four lobes of the brain across frequencies and engender whole-brain coherence.
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Dawson Church (Bliss Brain: The Neuroscience of Remodeling Your Brain for Resilience, Creativity, and Joy)