《英文msh词典》Stages,Sleep
[入口词] Stages,Sleep
[主题词] Sleep Stages
[英文释义] 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.