title: Sleep and estivation (shallow torpor): continuous processes of energy conservation.
abstract: Estivation (shallow torpor) in the round-tailed ground squirrel (Citellus tereticaudus) is entered through electrophysiologically defined states of sleep. Rapid-eye-movement sleep diminishes as body temperature falls in such a way that, at a body temperature of 26 degrees to 28 degrees C, torpor is characterized by almost continuous slow-wave sleep isomorphic with that observed at euthermic body temperatures.
mesh_terms: D000818:Animals; D001833:Body Temperature Regulation; D004734:Energy Metabolism; D005508:Food Deprivation; D006321:Heart / Q000502:physiology; D006339:Heart Rate; D006605:Hibernation; D012377:Rodentia / Q000502:physiology*; D012589:Sciuridae / Q000502:physiology*; D012621:Seasons; D012890:Sleep / Q000502:physiology*; D012895:Sleep, REM / Q000502:physiology