Awakening as an operant behavior: preliminary results.
D000818:Animals; D003216:Conditioning, Operant; D004569:Electroencephalography; D004576:Electromyography; D005502:Food; D008297:Male; D051381:Rats; D012201:Reward; D012894:Sleep Stages; D012895:Sleep, REM; D013997:Time Factors; D014851:Wakefulness