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"in dreams, your consciousness becomes sensation." -- If you are not allready familiar with lucid dreaming, i suggest you check out other texts on lucidity on the internet before you read this. When we are asleep, the brain ceases recieving input from other parts of the body. Thus, the brain is freed to generate its own sensations and experiences.Two states of sleep exist. S-synchronized sleep, or NREM sleep (nonrapid eye movement sleep), occupies most of the sleep period and is not associated with dreaming. D-sleep (dreaming, or desynchronized, sleep), or REM sleep (rapid eye movement sleep), occurs cyclically and is recognized by activity in the autonomic nervous system and by rapid eye movements. A person typically has four or five periods of D-sleep during the night, constituting about one-fourth of the night's sleep. A dream period usually lasts from 5 to 20 minutes. |