Vasotocin fibers in the mesencephalon and pons of the domestic fowl. An immunohistochemical study.

Immunohistochemical analysis of the extrahypothalamic distribution of vasotocin-like immunoreactive elements within the brainstem of the domestic fowl revealed several, topographically identifiable, mesencephalic and pontine target areas. In the considered regions numerous nerve endings were surrounding perikarya or large dendritic trunks. No extrahypothalamic immunopositive perikarya have been observed in normal birds.