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DEPOLARIZATION OF THE CENTRAL TERMINALS OF CUTANEOUS AFFERENT FIBERS

DEPOLARIZATION OF THE CENTRAL TERMINALS OF CUTANEOUS AFFERENT FIBERS J. C. R. F. l VV. D. ” Physiology, The Australian National University, Canberra, (Received for publication December 6, 1962) Australia previous investigations on the the central terminals afferent fibers. One paper (10) reported a variety experimental observations designed to test the hypothesis that this central depressed the synaptic efficacy the afferent fibers. It was found in seven separate tests that the observed s synaptic depressions corresponded closely to the phenomena presynaptic inhibition that was originally defined in relation to group Ia afferent volleys from muscle (8, 12, 14, 18, 19). The presynaptic s were observed as dorsal root potentials (DRP’s), P waves from the dorsum the cord, field potentials within the cord. These s accounted in large part for the observed depressions synaptic excitation as tested by responses interneurons monosynaptically excited by volleys; more indirectly by the flexor reflex, the ipsilateral tract discharge, the dorsal root potential. In earlier investigations with recording by a microelectrode in afferent fibers within the spinal cord (11, 21), it had been shown that there was indeed a these fibers that corresponded to the electrotonically transmitted along dorsal root fibers, the dorsal root potential. In the present study a more corn .prehensive http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

DEPOLARIZATION OF THE CENTRAL TERMINALS OF CUTANEOUS AFFERENT FIBERS

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Publisher
The American Physiological Society
Copyright
Copyright © 1963 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
Publisher site
See Article on Publisher Site

Abstract

J. C. R. F. l VV. D. ” Physiology, The Australian National University, Canberra, (Received for publication December 6, 1962) Australia previous investigations on the the central terminals afferent fibers. One paper (10) reported a variety experimental observations designed to test the hypothesis that this central depressed the synaptic efficacy the afferent fibers. It was found in seven separate tests that the observed s synaptic depressions corresponded closely to the phenomena presynaptic inhibition that was originally defined in relation to group Ia afferent volleys from muscle (8, 12, 14, 18, 19). The presynaptic s were observed as dorsal root potentials (DRP’s), P waves from the dorsum the cord, field potentials within the cord. These s accounted in large part for the observed depressions synaptic excitation as tested by responses interneurons monosynaptically excited by volleys; more indirectly by the flexor reflex, the ipsilateral tract discharge, the dorsal root potential. In earlier investigations with recording by a microelectrode in afferent fibers within the spinal cord (11, 21), it had been shown that there was indeed a these fibers that corresponded to the electrotonically transmitted along dorsal root fibers, the dorsal root potential. In the present study a more corn .prehensive

Journal

Journal of NeurophysiologyThe American Physiological Society

Published: Jul 1, 1963

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