A permissive role of corticosterone in an opioid form of stress-induced analgesia: blockade of opiate analgesia is not due to stress-induced hormone release.
Sutton LC, Fleshner M, Mazzeo R, Maier SF, Watkins LR. A permissive role of corticosterone in an opioid form of stress-induced analgesia: blockade of opiate analgesia is not due to stress-induced hormone release. Brain Res. 1994 Nov 07; 663(1):19-29.