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Suprasegmentary control of the intraspinal pathways of visceromotor reflexes

  • Physiology
  • Published:
Bulletin of Experimental Biology and Medicine Aims and scope

Summary

Experiments on spinal cats under chloraeose-nembutal anesthesia (45 mg and 15 mg per kg of body weight) were carried out to study the time and spatial sequence of activation of different neuron structures of the 5th lumbar segment of the spinal cord in stimulation of the ipsilateral splanchnic nerve.

The descending fast pathways of visceral impulses passing in the medial part of the dorsal columns of the spinal cord are outside of the sphere of control by the supraspinal centers. Analogous pathways passing in the region of the substantia gelatinosa and part of the lateral columns of the spinal cord adjoining the gray matter are under the tonic inhibitory influence of the supraspinal centers.

Breaking off connections of the spinal cord with the suprasegmentary structures considerably facilitates the transmission of visceral impulses to the segmentary neurons. This disconnection also eliminates the transmission of introceptive inhibitory influences to extensor motoneurons.

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Authors and Affiliations

  1. Laboratory of General Physiology, A. A. Bogomolets Institute of Physiology, Academy of Sciences of the UkrSSR, Kiev

    N. N. Preobrazhenskii & Z. A. Tamarova

Authors
  1. N. N. Preobrazhenskii
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  2. Z. A. Tamarova
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Preobrazhenskii, N.N., Tamarova, Z.A. Suprasegmentary control of the intraspinal pathways of visceromotor reflexes. Bull Exp Biol Med 62, 1081–1084 (1966). https://doi.org/10.1007/BF00795442

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  • DOI: https://doi.org/10.1007/BF00795442

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