Morphological correlates of chemically specified neuronal interactions in the hypothalamo-hypophyseal area.

This paper deals first with the high resolution radioautographic demonstration of monoaminergic innervation of the rat pituitary and of basal hypothalamus. It describes the serotonergic innervation of the intermediate, tuberal and neural pituitary lobes and of the median eminence as well as the dopaminergic terminals in the intermediate and neural lobes and in the median eminence. By combining the radioautographic and immunocytochemical procedures on the same sections it describes some intercellular and an intracellular relationships between monoamines and peptides in the basal hypothalamus. These results are considered in a minireview of inter-relationships previously described in the hypothalamo-hypophyseal area between neurons chemically identified by their neuromediators.