title: Electrophysiological investigation of natural sleep and waking in turtles and hens.
mesh_terms: D000818:Animals; D002645:Chickens / Q000502:physiology*; D004569:Electroencephalography; D005133:Eye Movements; D007103:Immobilization; D012890:Sleep; D012895:Sleep, REM; D014426:Turtles / Q000502:physiology*; D014851:Wakefulness