title: Differential effect of morphine on stimulation of primary versus higher order trigeminal terminals.
mesh_terms: D000818:Animals; D001362:Avoidance Learning / Q000187:drug effects; D008297:Male; D009020:Morphine / Q000494:pharmacology*; D051381:Rats; D012154:Reticular Formation / Q000187:drug effects; D013116:Spinal Cord / Q000187:drug effects*; D013787:Thalamic Nuclei / Q000187:drug effects*; D014276:Trigeminal Nerve / Q000187:drug effects*
chemical_list: D009020:Morphine