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Distinct sensorimotor feedback loops for dynamic and static control of primate precision grip

Tomomichi Oya, Tomohiko Takei, Kazuhiko Seki
doi: https://doi.org/10.1101/640201
Tomomichi Oya
1Department of Neurophysiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
2Department of Developmental Physiology, National Institute for Physiological Science, Aichi, Japan
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Tomohiko Takei
1Department of Neurophysiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
2Department of Developmental Physiology, National Institute for Physiological Science, Aichi, Japan
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Kazuhiko Seki
1Department of Neurophysiology, National Institute of Neuroscience, National Center of Neurology and Psychiatry, Tokyo, Japan
2Department of Developmental Physiology, National Institute for Physiological Science, Aichi, Japan
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  • For correspondence: seki@ncnp.go.jp
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Abstract

Volitional limb motor control involves dynamic and static muscle actions. It remains elusive how such distinct actions are controlled through separated or shared neural circuits. Here we explored the potential separation for dynamic and static controls in the primate hand actions, by investigating the neuronal coherence between local 1eld potentials (LFPs) of the spinal cord and the forelimb electromyographic activity (EMGs), and LFPs of the motor cortex and the EMGs during the performance of a precision grip in macaque monkeys. We observed the emergence of beta-range coherence with EMGs at spinal cord and motor cortex in the separated phases; spinal coherence during the grip phase and cortical coherence during the hold phase. Further, both of the coherence were influenced by bidirectional interactions with reasonable latencies as beta oscillatory cycles. These results indicate that dedicated feedback circuits comprising spinal and cortical structures underlie dynamic and static controls of dexterous hand actions.

Footnotes

  • Major revision including changes in the text and figures, and addition of supplemental figures.

Copyright 
The copyright holder for this preprint is the author/funder, who has granted bioRxiv a license to display the preprint in perpetuity. It is made available under a CC-BY-NC-ND 4.0 International license.
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Posted January 23, 2020.
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Distinct sensorimotor feedback loops for dynamic and static control of primate precision grip
Tomomichi Oya, Tomohiko Takei, Kazuhiko Seki
bioRxiv 640201; doi: https://doi.org/10.1101/640201
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Distinct sensorimotor feedback loops for dynamic and static control of primate precision grip
Tomomichi Oya, Tomohiko Takei, Kazuhiko Seki
bioRxiv 640201; doi: https://doi.org/10.1101/640201

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