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Intersegmental coordination of swimmeret motoneuron activity in crayfish

Intersegmental coordination of swimmeret motoneuron activity in crayfish Swimmeret in Crayfish Biological Sciences and Neurological University, Stanford 94305, and Department California, San Diego, La Jolla, California SEQUENCES Sciences Program, Neurosciences, 92037 ORDERLY muscular contractions MATERIALS AND METHODS occur during locomotion. To accomplish such behavior, the neuronal center controlling each limb must receive information about the contraction state in other limbs. Information this kind might involve timing cues from sensory input, from a set other local centers, or from a single “master” center (1, 11). Hughes and Wiersma (5), Ikeda and Wiersma (6), and Wiersma and Ikeda (10) have shown that the in tersegmental control crayfish swimmeret beating is dependent neither on sensory input nor on a single master center; that nonsensory timing they proposed information transferred among segmental oscillators is sufficient to produce ly coordinated motoneuron activity. Central neurons which are active during the discharge specific swimmeret motoneurons were- isolated from the interganglionic connectives by Hughes and Wiersma (5) and Wiersma and Hughes (9), who suggested that these cells might be influential in coupling the movements the . The present study provides evidence in support the hypothesis that these neurons are, in fact, coordinating fibers. It is shown first that their discharge is not dependent on http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of Neurophysiology The American Physiological Society

Intersegmental coordination of swimmeret motoneuron activity in crayfish

Journal of Neurophysiology , Volume 34: 310 – Mar 1, 1971

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Publisher
The American Physiological Society
Copyright
Copyright © 1971 the American Physiological Society
ISSN
0022-3077
eISSN
1522-1598
Publisher site
See Article on Publisher Site

Abstract

Swimmeret in Crayfish Biological Sciences and Neurological University, Stanford 94305, and Department California, San Diego, La Jolla, California SEQUENCES Sciences Program, Neurosciences, 92037 ORDERLY muscular contractions MATERIALS AND METHODS occur during locomotion. To accomplish such behavior, the neuronal center controlling each limb must receive information about the contraction state in other limbs. Information this kind might involve timing cues from sensory input, from a set other local centers, or from a single “master” center (1, 11). Hughes and Wiersma (5), Ikeda and Wiersma (6), and Wiersma and Ikeda (10) have shown that the in tersegmental control crayfish swimmeret beating is dependent neither on sensory input nor on a single master center; that nonsensory timing they proposed information transferred among segmental oscillators is sufficient to produce ly coordinated motoneuron activity. Central neurons which are active during the discharge specific swimmeret motoneurons were- isolated from the interganglionic connectives by Hughes and Wiersma (5) and Wiersma and Hughes (9), who suggested that these cells might be influential in coupling the movements the . The present study provides evidence in support the hypothesis that these neurons are, in fact, coordinating fibers. It is shown first that their discharge is not dependent on

Journal

Journal of NeurophysiologyThe American Physiological Society

Published: Mar 1, 1971

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