title: Alterations in morphine analgesia produced by chronic deficits of brain catecholamines or serotonin: role of analgesimetric procedure.
mesh_terms: D000700:Analgesics; D000818:Animals; D001923:Brain Chemistry; D002395:Catecholamines / Q000172:deficiency* / Q000502:physiology; D008297:Male; D008636:Mesencephalon / Q000502:physiology; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D012701:Serotonin / Q000172:deficiency* / Q000502:physiology; D014828:Vocalization, Animal / Q000187:drug effects
chemical_list: D000700:Analgesics; D002395:Catecholamines; D012701:Serotonin; D009020:Morphine