[Physiological mechanisms of hypothalamic influence on the erychron]

Stimulation of the rabbit anterior hypothalamus reduced the amount of reticulocytes in the blood, decreased the hematocrit, redistributed the intrarenal blood flow reducing the blood supply of the renal cortex. Stimulation of the posterior hypothalamus led to an increase in the reticulocytes amount and an isolated increase in the blood supply of the cortical nephrones' glomeruli. No changes of the plasma erythropoietic activity occurred. The data obtained suggest the hypothalamus-induced changes of the hemodynamics (in bone marrow and kidneys particularly) as one of the possible hypothalamic influences upon the erythrone.