
Sex differences in opioid-mediated pain inhibitory mechanisms during the interphase in the formalin test
Keywords: opioid; naloxone; gonadectomy; opioid; sex hormones; formalin test; ANOVA; analysis of variance; GDX; gonadectomized; i.t.; intrathecal; nor-BNI diHCL; norbinaltorphimine dihydrochloride; PIA; pregnancy-induced analgesia; SIA; stress-induced analgesia;