Structural model of vestibular effects on the blood pressure.

The model described in the present work is a structural presentation of certain aspcets of the vesibular effects on the blood pressure. The model comprises the joint action of the otolith system and the semicircular canals, gangl. Scarpe, the vestibular nuclei, the vasomotor centre and the nuclei of n. vagus. The direct transfer of information both from gangl. Scarpe to the vasoregulating centre and from nucl. Schwalbe to the vagal nuclei, as well as its polysynaptic transmission, are considered. The model examines a case when only two factors, namely decrease in the heart rate controlled by n. vagus and decrease in the heart tone controlled by the vasoregulating centre, determine the effect of blood pressure drop after vestibular stimulation. The structure of the model is flexible and permits its elaboration by including additional factors for the blood pressure drop.