RESPONSE OF HYPOTHALAMIC ACCESSORY NONAPEPTIDERGIC CENTERS TO HYPOPHYSECTOMY IN RATS

Accessory centers were calculated to contain more than 600 nonapeptide rgic cells, most of which proved to be oxytocinergic. One week after h ypophysectomy, morphometric measurements and morphofunctional changes in the nonapeptidergic cells of accessory centers indicated decreased synthesis of oxytocin and vasopressin by these cells as well as dimini shed transport of these neurohormones along their fibers. In contrast to the supraoptic, postoptic, and paraventricular nuclei, no degenerat ive cells were present in the accessory centers following hypophysecto my.