The endogenous opioid system modulates defensive behavior evoked by Crotalus durissus terrificus: Panicolytic-like effect of intracollicular non-selective opioid receptors blockade.
Fabrício CalvoBruno Lobão-SoaresRenato Leonardo de FreitasTatiana Paschoalin-MaurinTayllon Dos Anjos-GarciaPriscila MedeirosJuliana Almeida da SilvaThelma Anderson LovickNorberto Cysne CoimbraPublished in: Journal of psychopharmacology (Oxford, England) (2018)
These findings suggest a panicolytic-like effect of endogenous opioid receptors antagonism in the inferior colliculus on innate (panic attack) and conditioned (anticipatory anxiety) fear in rats threatened by rattlesnakes.