title: Sleep and the beginnings of behavior in the animal kingdom--studies of ultradian motility cycles in early life.
mesh_terms: D000367:Age Factors; D000818:Animals; D000831:Animals, Newborn / Q000502:physiology; D001001:Anura / Q000502:physiology; D003386:Brachyura / Q000502:physiology; D002645:Chickens / Q000502:physiology; D003058:Cockroaches / Q000502:physiology; D005333:Fetus / Q000502:physiology; D005399:Fishes / Q000502:physiology; D008116:Lizards / Q000502:physiology; D008974:Mollusca / Q000502:physiology; D009043:Motor Activity / Q000502:physiology*; D009119:Muscle Contraction; D009132:Muscles / Q000502:physiology; D010802:Phylogeny; D051381:Rats; D012756:Sheep / Q000502:physiology; D012890:Sleep / Q000502:physiology*; D013550:Swimming; D014863:Wasps / Q000502:physiology