title: Effects of prefrontal cortex ablation on two-bar ratio performance in primates.
mesh_terms: D000818:Animals; D003216:Conditioning, Operant; D003463:Cues; D005260:Female; D005625:Frontal Lobe / Q000502:physiology* / Q000601:surgery; D000882:Haplorhini; D008297:Male; D012055:Reinforcement Schedule