Corner, M A Sleep and the beginnings of behavior in the animal kingdom--studies of ultradian motility cycles in early life. [electronic resource] - Progress in neurobiology 1977 - 279-95 p. digital Publication Type: Comparative Study; Journal Article; Review ISSN: 0301-0082 Standard No.: 10.1016/0301-0082(77)90008-9 doi Subjects--Topical Terms: Age FactorsAnimalsAnimals, Newborn--physiologyAnura--physiologyBrachyura--physiologyChickens--physiologyCockroaches--physiologyFetus--physiologyFishes--physiologyLizards--physiologyMollusca--physiologyMotor Activity--physiologyMuscle ContractionMuscles--physiologyPhylogenyRatsSheep--physiologySleep--physiologySwimmingWasps--physiology