Lesions in the amygdala and the frustration effect.
D000679:Amygdala / Q000502:physiology*; D000818:Animals; D003216:Conditioning, Operant; D005108:Extinction, Psychological; D005247:Feeding Behavior; D005639:Frustration; D008124:Locomotion; D008297:Male; D051381:Rats; D012055:Reinforcement Schedule; D012201:Reward; D013238:Stereotaxic Techniques