Discriminative effects of morphine administered intracerebrally in the rat.
D000818:Animals; D001921:Brain / Q000187:drug effects*; D002535:Cerebral Aqueduct; D004193:Discrimination Learning / Q000187:drug effects / Q000502:physiology*; D004305:Dose-Response Relationship, Drug; D007276:Injections, Intraventricular; D008297:Male; D009020:Morphine / Q000008:administration & dosage / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D013787:Thalamic Nuclei / Q000187:drug effects
D009270:Naloxone; D009020:Morphine