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Comparison of subjective peripheral sensation, F-waves, and somatosensory evoked potentials in response to a unilateral pinch task measured on the contractile and non-contractile sides

View ORCID ProfileTerumasa Takahara, Hidetaka Yamaguchi, Kazutoshi Seki, Sho Onodera
doi: https://doi.org/10.1101/2021.12.02.470947
Terumasa Takahara
1Department of Sport Social Management, KIBI International University, 8 Igamachi, Takahashi, Okayama, 716-8508, Japan
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  • For correspondence: takahara@kiui.ac.jp
Hidetaka Yamaguchi
1Department of Sport Social Management, KIBI International University, 8 Igamachi, Takahashi, Okayama, 716-8508, Japan
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Kazutoshi Seki
2Department of Human Health and Wellbeing, University of Marketing and Distribution Science, Kobe. 3-1 Gakuen-Nishimachi, Nishi-ku, Kobe, Hyogo 651-2188, Japan
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Sho Onodera
3Department of Health and Sports Science, Kawasaki University of Medical Welfare, 288 Matsushima, Kurashiki, Okayama, 701-0193, Japan
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Abstract

Depression of sensory input during voluntary muscle contractions has been demonstrated using electrophysiological methods in both animals and humans. However, the association between electrophysiological responses of the sensory system and subjective peripheral sensation (SPS) during a voluntary muscle contraction remains unclear. Our aim in this study was to describe the changes in SPS, spinal α-motoneuron excitability (F-wave to M-wave amplitude), and somatosensory evoked potentials (SEPs) during a unilateral pinch-grip task. Outcome variables were measured on the side ipsilateral and contralateral to the muscle contraction, and at rest (control). Participants were 8 healthy men, 20.9±0.8 years of age. The isometric pinch-grip task was performed at 30% of the maximum voluntary isometric force measured for the right and left hand separately. The appearance rate of the F-wave during the task was significantly higher for the ipsilateral (right) hand than for the contralateral (left) hand and control condition. Although there was no difference in F-wave latency between hands and the control condition, the amplitude of the F-wave was significantly higher for the ipsilateral (right) hand than for the contralateral (left) hand and the control condition. There was no difference in the amplitude of the SEP at N20. However, the amplitude at P25 was significantly lower for the ipsilateral (right) hand than for the contralateral (left) hand and the control condition. The accuracy rate of detecting tactile stimulation, evaluated for 20 repetitions using a Semmes–Weinstein monofilament at the sensory threshold for each participant, was significantly lower during the pinch-grip task for both the ipsilateral (right) and contralateral (left) hand compared to the control condition. Overall, our findings show that SPS and neurophysiological parameters were not modulated in parallel during the task, with changes in subjective sensation preceding changes in electrophysiological indices during the motor task. Our findings provide basic information on sensory-motor coordination.

Competing Interest Statement

The authors have declared no competing interest.

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 4.0 International license.
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Posted December 02, 2021.
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Comparison of subjective peripheral sensation, F-waves, and somatosensory evoked potentials in response to a unilateral pinch task measured on the contractile and non-contractile sides
Terumasa Takahara, Hidetaka Yamaguchi, Kazutoshi Seki, Sho Onodera
bioRxiv 2021.12.02.470947; doi: https://doi.org/10.1101/2021.12.02.470947
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Comparison of subjective peripheral sensation, F-waves, and somatosensory evoked potentials in response to a unilateral pinch task measured on the contractile and non-contractile sides
Terumasa Takahara, Hidetaka Yamaguchi, Kazutoshi Seki, Sho Onodera
bioRxiv 2021.12.02.470947; doi: https://doi.org/10.1101/2021.12.02.470947

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