title: Sleep of unrestrained chimpanzee: differences between first and last rapid eye movement periods.
mesh_terms: D000818:Animals; D004325:Dreams; D004569:Electroencephalography; D006339:Heart Rate; D015186:Hominidae; D006801:Humans; D009068:Movement; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM