title: Brain stem neuronal circuitry underlying the antinociceptive action of opiates.
authors.forename: H L
authors.initials: HL
authors.lastname: Fields
authors.forename: N M
authors.initials: NM
authors.lastname: Barbaro
authors.forename: M M
authors.initials: MM
authors.lastname: Heinricher
mesh_terms: D000818:Animals; D001933:Brain Stem / Q000187:drug effects / Q000503:physiopathology*; D009020:Morphine / Q000494:pharmacology*; D009619:Nociceptors / Q000187:drug effects*; D010146:Pain / Q000503:physiopathology*; D051381:Rats
chemical_list: D009020:Morphine