title: Formation of the sleep-regulating mechanisms in vertebrates.
abstract: The paper presents new data concerning the mechanisms of regulation of sleep-like states in vertebrates. Somato-vegetative and behavioral correlates of primary sleep (fish, amphibians), intermediate sleep (reptiles), slow-wave and paradoxical sleep (birds) are described. The evolutionary more ancient hypothalamo-cortical and young thalamo-cortical levels of regulation of different forms of sleep are examined. Problems of existence of functional analogues of homoiotherms' sleep are discussed.
mesh_terms: D000663:Amphibians / Q000502:physiology; D000818:Animals; D001717:Birds / Q000502:physiology; D005399:Fishes / Q000502:physiology; D006339:Heart Rate; D007031:Hypothalamus / Q000503:physiopathology; D009119:Muscle Contraction; D009126:Muscle Relaxation; D012104:Reptiles / Q000502:physiology; D012890:Sleep / Q000502:physiology*; D012894:Sleep Stages; D014714:Vertebrates / Q000502:physiology*