title: Paradoxical sleep and the nature-nurture controversy.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D002490:Central Nervous System / Q000502:physiology*; D004777:Environment; D005824:Genetics, Behavioral; D008957:Models, Genetic; D008959:Models, Neurological; D012895:Sleep, REM / Q000502:physiology*