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FREQUENCY OF CENTRIPETAL STIMULATION IN INHIBITION AND FACILITATION OF THE KNEE-JERK

FREQUENCY OF CENTRIPETAL STIMULATION IN INHIBITION AND FACILITATION OF THE KNEE-JERK (Received 9, 1946) the reflex effects produced by a single volley or brief tetanic volleys upon a background of excitatory reflexes (1). Some authors have made scattered comments upon the relation of to the frequency of afferent stimulation (3, 11). The data in the literature, however, do not warrant conclusions about the relation of the intensity of the inhibitory process to the frequency of afferent stimulation. The experiments reported in this paper were undertaken with the object of investigating this relation. of the knee-jerk was chosen because it is one of the simplest (i.e., involving the fewest neurons) inhibitory reflexes known (8,9). Experimental conditions were simplified by using the acute spinal cat. It soon became obvious that stimulation of any nerve in the hind legs of a spinal cat produces mixed effects, excitatory inhibitory, upon the motoneurons innervating the quadriceps muscle. The present report is a description of the influence of frequency duration of the centripetal stimulation in facilitating inhibiting the knee-jerk in producing other reflex activity of this muscle. The data presented permit an analysis of the role of the frequency of afferent stimulation in determining the intensity of the inhibitory excitatory processes. In etherized cats, the http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

FREQUENCY OF CENTRIPETAL STIMULATION IN INHIBITION AND FACILITATION OF THE KNEE-JERK

Harriet M. Maling
Journal of Neurophysiology , Volume 9: 317 – Jul 1, 1946
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Publisher
The American Physiological Society
Copyright
Copyright © 1946 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
Publisher site
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Abstract

(Received 9, 1946) the reflex effects produced by a single volley or brief tetanic volleys upon a background of excitatory reflexes (1). Some authors have made scattered comments upon the relation of to the frequency of afferent stimulation (3, 11). The data in the literature, however, do not warrant conclusions about the relation of the intensity of the inhibitory process to the frequency of afferent stimulation. The experiments reported in this paper were undertaken with the object of investigating this relation. of the knee-jerk was chosen because it is one of the simplest (i.e., involving the fewest neurons) inhibitory reflexes known (8,9). Experimental conditions were simplified by using the acute spinal cat. It soon became obvious that stimulation of any nerve in the hind legs of a spinal cat produces mixed effects, excitatory inhibitory, upon the motoneurons innervating the quadriceps muscle. The present report is a description of the influence of frequency duration of the centripetal stimulation in facilitating inhibiting the knee-jerk in producing other reflex activity of this muscle. The data presented permit an analysis of the role of the frequency of afferent stimulation in determining the intensity of the inhibitory excitatory processes. In etherized cats, the

Journal

Journal of Neurophysiology – The American Physiological Society

Published: Jul 1, 1946

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