Sleep Stages
Periods of sleep manifested by changes in EEG activity and certain behavioral correlates; they formerly included Stage 1: sleep onset, drowsy sleep; Stage 2: light sleep; Stages 3 and 4: delta sleep, light sleep, deep sleep, telencephalic sleep. In 2007, sleep stages were redefined by The American Academy of Sleep Medicine (AASM) as: N1-N2 (sleep onset - light sleep), N3 (SLOW-WAVE SLEEP), and REM SLEEP.
Also Known As:
N1-Sleep; N2-Sleep; NREM Stage 1; NREM Stage 2; N1 Sleep; N2 Sleep; Sleep Stage; Stage, Sleep; Stages, Sleep
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