Effects of morphine on intracranial self-stimulation to various brain stem loci.
D000818:Animals; D001933:Brain Stem / Q000187:drug effects* / Q000502:physiology; D004305:Dose-Response Relationship, Drug; D008297:Male; D051379:Mice; D009020:Morphine / Q000494:pharmacology*; D012054:Reinforcement, Psychology; D012653:Self Stimulation / Q000187:drug effects* / Q000502:physiology
D009020:Morphine