Disappointment and drugs in the rat.
D000654:Amobarbital / Q000494:pharmacology*; D000818:Animals; D001921:Brain / Q000502:physiology; D005108:Extinction, Psychological; D005239:Fear; D005639:Frustration / Q000187:drug effects*; D009042:Motivation; D010919:Placebos; D011678:Punishment; D051381:Rats; D012201:Reward
D010919:Placebos; D000654:Amobarbital