Типовий характер сну у молодих людей
Rapid eye movement (REM) sleep occurs cyclically throughout the night every 90–120 min. Brief periods of wakefulness (stage W) occur periodically. Sleep time is spent as follows:
Stage N1: 2–5%
Stage N2: 45–55%
Stage N3: 13–23%
REM: 20–25%
Серед цих тем