title: Morphine: ability to block neuronal activity evoked by a nociceptive stimulus.
mesh_terms: D000200:Action Potentials / Q000187:drug effects*; D000818:Animals; D001933:Brain Stem / Q000187:drug effects*; D002746:Chlorpromazine / Q000494:pharmacology; D007981:Levorphanol / Q000494:pharmacology; D008297:Male; D008691:Methadone / Q000494:pharmacology; D009020:Morphine / Q000037:antagonists & inhibitors / Q000494:pharmacology*; D009270:Naloxone / Q000494:pharmacology; D010111:Oxymorphone / Q000494:pharmacology; D010146:Pain / Q000503:physiopathology*; D010424:Pentobarbital / Q000494:pharmacology; D051381:Rats; D012154:Reticular Formation / Q000187:drug effects*
chemical_list: D007981:Levorphanol; D009270:Naloxone; D009020:Morphine; D010111:Oxymorphone; D010424:Pentobarbital; D002746:Chlorpromazine; D008691:Methadone