title: Electrical self-stimulation of single and multiple loci: long term observations.
mesh_terms: D000818:Animals; D002940:Circadian Rhythm; D004327:Drinking Behavior; D005247:Feeding Behavior; D007031:Hypothalamus / Q000502:physiology*; D008027:Light; D008297:Male; D010507:Periodicity; D051381:Rats; D012653:Self Stimulation; D012688:Septum Pellucidum / Q000502:physiology*; D013997:Time Factors