Hippocampus and internal inhibition.
D000818:Animals; D001143:Arousal; D001522:Behavior, Animal; D003216:Conditioning, Operant; D004594:Electrophysiology; D005108:Extinction, Psychological; D006624:Hippocampus / Q000033:anatomy & histology / Q000502:physiology*; D008568:Memory; D011214:Practice, Psychological; D051381:Rats; D011930:Reaction Time