[Sleep--1. The physiology of sleep].
D000368:Aged; D000375:Aging; D000818:Animals; D002415:Cats; D002540:Cerebral Cortex / Q000502:physiology; D006801:Humans; D051379:Mice; D051381:Rats; D012890:Sleep / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology