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REM
sleep refers to invervals during a sleep period when the eyes
move rapidly under closed eyelids. Many scientists believe
that dreaming occurs during REM sleep. REM and non-REM sleep
(with no rapid eye movements) occur cyclically throughout
a sleep period. One cycle may take about 90 minutes, and REM
sleep may occur for about 20 minutes, usually toward the end
of this cycle.
Further reading: "The Remains
of the Day"
by Catherine E. Myers. Copyright © 2006 Memory Loss and the Brain |
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