[Local blood flow in the emotiogenic structures of the brain in freely moving rats].

The speed of local blood flow (SLBF) in positive emotiogenic hypothalamic zones was recorded in free-moving white rats, by the method of hydrogen clearance, in states of passive and active alertness, in conditions of artificial (local) activation (by cathode) and inactivation (by DC anode) and also during stimulation of other positive and negative emotiogenic structures. It was established that the natural or artificial activation of the emotiogenic brain zones elicits an increase of SLBF and the inactivation evokes its reduction. Blood flow of the positive emotiogenic brain zones is intensified by stimulation of other positive emotiogenic structures, is reduced by stimulation of the negative emotiogenic zones and does not change at stimulation of emotionally neutral zones. It is suggested, that the mechanism of vascular reactions elicited by activation of positive and negative emotiogenic brain structures has a neurogenic basis and is performed in the type of "axon-reflex" by collaterals of ascending and descending fibers of the forebrain medial bundle.