title: The temporal structure of motivation. III. Identification and ecological significance of ultradian rhythms of intracranial reinforcement.
mesh_terms: D000818:Animals; D005247:Feeding Behavior / Q000502:physiology; D008297:Male; D008474:Medial Forebrain Bundle / Q000502:physiology; D009042:Motivation / Q000502:physiology*; D010507:Periodicity; D051381:Rats; D012653:Self Stimulation / Q000502:physiology*