title: Hippocampal lesions and performance on a geometric progressive ratio schedule.
mesh_terms: D000818:Animals; D002540:Cerebral Cortex / Q000502:physiology; D003216:Conditioning, Operant / Q000502:physiology*; D005260:Female; D006624:Hippocampus / Q000502:physiology*; D008297:Male; D051381:Rats; D012055:Reinforcement Schedule; D013997:Time Factors