title: Intracranial self-administration of morphine into the ventral tegmental area in rats.
mesh_terms: D000818:Animals; D004343:Drug Implants; D007700:Kinetics; D008297:Male; D009020:Morphine / Q000008:administration & dosage*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D012054:Reinforcement, Psychology; D012201:Reward; D012646:Self Administration; D013681:Tegmentum Mesencephali / Q000187:drug effects*
chemical_list: D004343:Drug Implants; D009270:Naloxone; D009020:Morphine