Incidence and magnitude of the "priming effect" in self-stimulating rats.
D000818:Animals; D003216:Conditioning, Operant; D004558:Electric Stimulation; D004567:Electrodes, Implanted; D005108:Extinction, Psychological; D006799:Housing, Animal; D007031:Hypothalamus / Q000502:physiology*; D008124:Locomotion; D008297:Male; D051381:Rats; D012055:Reinforcement Schedule; D012201:Reward; D012653:Self Stimulation; D013238:Stereotaxic Techniques