title: Periodicity within sleep and operant performance in the cat.
mesh_terms: D000818:Animals; D002415:Cats; D002940:Circadian Rhythm; D003216:Conditioning, Operant; D004558:Electric Stimulation; D004569:Electroencephalography; D004576:Electromyography; D005133:Eye Movements; D005508:Food Deprivation; D007031:Hypothalamus; D010507:Periodicity; D012054:Reinforcement, Psychology; D012890:Sleep; D012894:Sleep Stages; D012895:Sleep, REM; D014851:Wakefulness