title: Endogenous opioid ligands may mediate stress-induced changes in the affective properties of pain related behavior in rats.
mesh_terms: D000818:Animals; D001522:Behavior, Animal / Q000502:physiology*; D004723:Endorphins / Q000502:physiology*; D008297:Male; D009270:Naloxone / Q000494:pharmacology; D010146:Pain / Q000503:physiopathology* / Q000523:psychology; D051381:Rats; D011930:Reaction Time / Q000187:drug effects; D012149:Restraint, Physical; D013312:Stress, Physiological / Q000503:physiopathology*
chemical_list: D004723:Endorphins; D009270:Naloxone