Paradoxical sleep in the chick (Gallus domesticus).
D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn / Q000502:physiology*; D002645:Chickens / Q000502:physiology*; D002940:Circadian Rhythm; D003201:Computers; D004567:Electrodes, Implanted; D004569:Electroencephalography; D004576:Electromyography; D006801:Humans; D008297:Male; D012895:Sleep, REM; D013997:Time Factors