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Sleep Stages
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Definition
: Periods of sleep manifested by changes in EEG activity and certain behavioral correlates; includes Stage 1: sleep onset, drowsy sleep; Stage 2: light sleep; Stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep.
Examples
Sleep, REM
Other names
Drowsiness; Stages, Sleep; Stage, Sleep; Sleep Stage; Drowsinesses