By Marvin Rosen
Achieve a greater knowing of the way and why the mind motives us to sleep and to dream, how sleep styles paintings, and the way desires healthy into the sleep procedure.
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Extra resources for Sleep And Dreaming (Gray Matter)
Example text
This means that groups of brain cells are firing together. This is very different from what happens when we are 33 34 Sleep and Dreaming awake. The waking brain fires in an asynchronous manner; that is, individual brain cells fire individually as they transmit and process information. During REM sleep—that is, during dreaming—brain waves resemble those characteristic of an awakened state. DREAM FORMATION Current understanding of dream formation is that the images and thought processes of dreaming are modifications of thought processes that occur during wakefulness.
As you fall asleep, your brain produces slow (8 to 13 per second), high-voltage alpha waves, which are characteristic of calm wakefulness. Breathing rate and brain activity slow further, and the brain produces lower voltage waves. This phase is called Stage 1 sleep. In Stage 1 sleep, alpha waves become less regular, diminish in amplitude, and then disappear. At this point, you lose awareness of the outside world. During Stage 1 sleep, you may experience fantastic images similar to hallucinations.
Deep sleep may weed out certain weak nerve cell connections while strengthening new connections. Studies of rats by Bruce McNaughton, a physiological psychologist at the University of Arizona, showed that the same neurons activated in learning a maze are reactivated during sleep. These findings suggest that the brain may be reviewing recently stored data. Another theory is that sleep may flush toxic chemical wastes that build up in the brain during the day. Like the rest of the body, the brain runs on the metabolism of glucose.
