Effects of morphine on fixed interval-induced escape from food reinforcement.
D000704:Analysis of Variance; D000818:Animals; D010856:Columbidae; D004305:Dose-Response Relationship, Drug; D004924:Escape Reaction / Q000187:drug effects*; D005502:Food; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D012055:Reinforcement Schedule
D009020:Morphine