Circulatory responses to selective activation of myelinated and unmyelinated fibers of the aortic nerve
In experiments on thoracotomized cats the arterial blood pressure (BP), cardiac frequency, force of contraction of a fragment of the left ventricle, and the resistance of the blood vessels of the hind limb were recorded. Myelinated and unmyelinated fibers (A and C fibers) of the left aortic nerve were stimulated selectively. Lowering of BP in response to stimulation of A fibers was observed to take place mainly through a decrease in the peripheral vascular resistance, whereas during excitation of C fibers the cardiac component of the reflex — a reduction in the frequency and force of cardiac contractions — was most marked.
Key wordsnervous regulation of the circulation myelinated and unmyelinated fibers vascular baroreceptors
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- 1.E. P. Anyukhovskii and G. G. Beloshapko, Byull. Éksp. Biol. Med., No. 1, 3 (1978).Google Scholar
- 2.H. Aars and L. Myhler, Acta Physiol. Scand.,91, 43A (1974).Google Scholar
- 4.W. W. Douglas and J. M. Richie, J. Physiol. (London),132, 187 (1956).Google Scholar
- 5.W. W. Douglas and W. Schanmanor, J. Physiol. (London),132, 173 (1956).Google Scholar
- 7.B. Oberg, Ann. Rev. Physiol.,38, 537 (1977).Google Scholar
- 8.P. Sleight and J. G. Widdicombe, J. Physiol. (London),181 235 (1965).Google Scholar