the protective effect of i.c.v . naloxone was reversed by treatments which disrupted sympathetic outflow to the adrenal medulla , i.e . ganglionic blockade by chorisondamine chloride or denervation of the adrenal glands or by inhibition of beta-adrenoceptive sites by propranolol .
C0001629
adrenal medulla
C0001625
adrenal glands