title: The tonic hypothesis and the patterning of behavior.
mesh_terms: D000818:Animals; D001143:Arousal; D003411:Arvicolinae; D003400:Astacoidea; D001519:Behavior / Q000502:physiology*; D002335:Carnivora; D005399:Fishes; D006120:Grooming; D006801:Humans; D051379:Mice; D008960:Models, Psychological; D009987:Orthoptera; D013239:Stereotyped Behavior / Q000502:physiology*; D014276:Trigeminal Nerve / Q000502:physiology; D014828:Vocalization, Animal