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Role of the various groups of afferent fibers of the mesenteric nerves in vasomotor reflexes

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Abstract

The dependence of the magnitude and character of vasomotor reflexes on the amplitude of tetanic stimulation of the mesenteric nerves was investigated in experiments on anesthetized cats. Comparison of the results of analysis of the stimulus amplitude versus reflex magnitude curves with previous data on excitability of the various groups of mesenteric nerve fibers revealed three groups of "vasomotor" afferents with different conduction velocities: fast-conducting Aδ-fibers (conduction velocity over 8 m/sec) evoking depressor or small pressor reflexes; slow-conducting Aδ-fibers (conduction velocity below 8 m/sec), evoking pressor reflexes or, by interaction with impulses of lower-threshold, fast-conducting Aδ-fibers, either reduce the magnitude of the depressor reflexes evoked by those impulses or increase the corresponding pressor reflexes; C-fibers increasing the magnitude of the pressor reflexes evoked by slow-conducting A-fibers.

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Authors
  1. E. V. Lukoshkova
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Additional information

Institute of Normal and Pathological Physiology, Academy of Medical Sciences of the USSR, Moscow. Translated from Neirofiziologiya, Vol. 7, No. 4, pp. 395–402, July–August, 1975.

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Lukoshkova, E.V. Role of the various groups of afferent fibers of the mesenteric nerves in vasomotor reflexes. Neurophysiology 7, 306–311 (1975). https://doi.org/10.1007/BF01063243

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  • DOI: https://doi.org/10.1007/BF01063243

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