[Mechanism of the effect of the midbrain reticular formation on the hypothalamus-hypophysis-thyroid gland system].

: The role of the posterior hypothalamic nuclei in the transmission of the influences of the mesencephalic reticular formation upon the thyroid hormone secretion was studied. Stimulation of the mesencephalic reticular formation in anesthetized cats was followed by the excitation of the thyroid hormoone secretion: the content of the blood protein-bound iodine was increased. This effect was eliminated after the bilateral coagulation of the posterior hypothalamic nuclei. These findings confirmed the hypothesis on the leading role of the posterior hypothalamic nuclpeus in the stimulation of the hormone secretion.