
Keywords: درد; BLa; basolateral nucleus; BLC; basolateral nuclear complex; CCK+; cholecystokinin-positive; DAB; diaminobenzidine; DOR; delta opioid receptor; KOR; kappa opioid receptor; MOR; mu opioid receptor; MOR+; MOR-positive; MOR-ir; MOR-immunoreactivity; PAG; peri