these results show that ( i ) electrical stimulation of brain areas concerned with the control of gonadotrophin and other pituitary hormone secretion changes the metabolic activity of nuclei and neural pathways extrinsic as well as intrinsic to the hypothalamic-pituitary system , ( ii ) the [ 14c ] 2-deoxyglucose method can detect changes in antidromic as well as orthodromic activity and in multi-synaptic pathways , ( iii ) neuroanatomical pathways are not always activated metabolically by electrical stimulation , and ( iv ) the preoptic-suprachiasmatic nucleus gonadotrophin control system is discrete and is little affected by increased metabolic activity of the hypothalamus produced by stimulation of the anterior hypothalamic area or other brain areas .
C0038866
suprachiasmatic nucleus
C0006104
brain