title: Antinociceptive responses after microinjection of morphine or lanthanum in discrete rat brain sites.
mesh_terms: D000700:Analgesics; D000818:Animals; D001921:Brain; D002118:Calcium / Q000494:pharmacology; D002535:Cerebral Aqueduct; D007276:Injections, Intraventricular; D007811:Lanthanum / Q000008:administration & dosage / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D008297:Male; D008845:Microinjections; D009020:Morphine / Q000008:administration & dosage / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D051381:Rats; D011930:Reaction Time / Q000187:drug effects
chemical_list: D000700:Analgesics; D009270:Naloxone; D007811:Lanthanum; D009020:Morphine; D002118:Calcium