Regularity in the control of the free-running sleep-wakefulness rhythm.
D000293:Adolescent; D000328:Adult; D002940:Circadian Rhythm; D004562:Electrocardiography; D004569:Electroencephalography; D004585:Electrooculography; D006185:Habituation, Psychophysiologic; D006801:Humans; D008297:Male; D012894:Sleep Stages; D012895:Sleep, REM; D014851:Wakefulness