title: Apparent independence of opiate reinforcement and electrical self-stimulation systems in rat brain.
mesh_terms: D000818:Animals; D002421:Caudate Nucleus / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D007031:Hypothalamus / Q000502:physiology*; D008297:Male; D009270:Naloxone / Q000494:pharmacology*; D051381:Rats; D011957:Receptors, Opioid / Q000502:physiology; D012054:Reinforcement, Psychology; D012653:Self Stimulation / Q000187:drug effects*
chemical_list: D011957:Receptors, Opioid; D009270:Naloxone