title: The sleep-waking cycle.
mesh_terms: D000818:Animals; D001683:Biological Clocks; D001933:Brain Stem / Q000502:physiology; D002415:Cats; D003655:Decerebrate State; D004558:Electric Stimulation; D004569:Electroencephalography; D012890:Sleep; D012895:Sleep, REM; D014851:Wakefulness