title: Differential effect of morphine on central versus peripheral nociception.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects; D001921:Brain / Q000187:drug effects*; D004597:Electroshock; D008297:Male; D008636:Mesencephalon / Q000187:drug effects; D009020:Morphine / Q000494:pharmacology*; D010146:Pain; D011149:Pons / Q000187:drug effects; D051381:Rats; D013116:Spinal Cord / Q000187:drug effects*
chemical_list: D009020:Morphine