[The influence of a protein deficient diet on the activity of the hypothalamus-neurohypophysial system].

In mature as well as in prebuberal rats protein deficient diets activate the hypothalamo-neurohypophysial system, which is morphologically characterised by the decrease of neurosecret in the posterior pituitary and the increase of the cell nuclear volume of the supraoptic and paraventricular nuclei. The neuronal activity is stimulated significantly stronger by a protein deficient diet with addition of some essential amino acids (lysine, tryptophane, threonine and isoleucine) than by an extremely deficient protein diet in so far as it occurs in the cell nuclear volume of both neurosecretoric hypothalamic nuclei.