Accession Number : AD0660732

Title :   IMPORTANCE OF THE AMPLITUDE OF PULSE PRESSURE FLUCTUATIONS FOR THE ACTIVITY OF THE CAROTID SINUS BARORECEPTORS,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Filistovich,V. I. ; Gero,Ya. I. ; Gerova,M. A.

Report Date : 27 APR 1967

Pagination or Media Count : 16

Abstract : The changes of afferent impulsation in the fibers of the sinocarotid nerve and the depressor reflexes of blood pressure occurring with a change from nonpulsating to an identical pulsating pressure in the carotid sinus are dependent on the amplitude of the pulse oscillations of this pressure. An increase only of the amplitude of the pressure pulsations in the carotid sinus with their constant frequency and with an unchanged level of basal pressure may lead to an increase of the frequency of the impulses in the 'salvoes', an increase of the total number of impulses occurring in a single fiber of the sinus nerve per unit time and to the activation of the afferent fibers remaining inactive in the case of a lesser amplitude. An intensification of the activity of the afferent fibers of the sinocarotid nerve corresponds to the effects of an intensification of the depressor reactions of blood pressure noted under similar conditions during changes of the amplitude of pressure pulsation in the carotid sinus. The value of the amplitude of pulse pressure oscillations in their reflex effect on the vascular system is dependent on the frequency of these oscillations. A change from a constant pressure to a pulsating pressure, characterized by a small frequency of pulsations, causes a decrease of the total number of impulses occurring in the fibers in a unit time. This must be taken into account in relation to the absence of reflex reactions of blood pressure in such cases. The total number of action potentials arising in the fibers of the sinocarotid nerve in a unit time is of great importance in the occurrence of reflex reactions in the case of pulsating pressure in the carotid sinus. (Author)

Descriptors :   (*BLOOD PRESSURE, ELECTROPHYSIOLOGY), ARTERIES, NERVES, REFLEXES, PULSE RATE, NERVE IMPULSES, NERVE FIBERS, CARDIOVASCULAR SYSTEM, USSR

Subject Categories : Anatomy and Physiology

Distribution Statement : APPROVED FOR PUBLIC RELEASE