Sensory gating and suppression of subjective peripheral sensations during voluntary muscle contraction

During voluntary muscle contraction, sensory information induced by electrostimulation of the nerves supplying the contracting muscle is inhibited and the somatosensory evoked potentials (SEPs) amplitude decreases. This depression of sensory input during voluntary muscle contraction has been demonst...

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Bibliographic Details
Published in:BMC neuroscience 2020-10, Vol.21 (1), p.41-41, Article 41
Main Authors: Takahara, Terumasa, Yamaguchi, Hidetaka, Seki, Kazutoshi, Onodera, Sho
Format: Article
Language:English
Subjects:
Accuracy
Excitability
F-wave
Gating
Hypotheses
Latency
Muscle contraction
Nerves
Nervous system
Neurophysiology
Skeletal muscle
Somatosensory evoked potential
Somatosensory evoked potentials
Spinal cord
Subjective peripheral sensation
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Summary:During voluntary muscle contraction, sensory information induced by electrostimulation of the nerves supplying the contracting muscle is inhibited and the somatosensory evoked potentials (SEPs) amplitude decreases. This depression of sensory input during voluntary muscle contraction has been demonstrated by many studies using electrophysiological methods. However, the association between the electrophysiological response of the sensory system during sustained muscle contraction and subjective peripheral sensation (SPS) is still unclear. The aim of this study was to investigate changes in spinal excitability, SEPs, and SPS during voluntary muscle contraction. The appearance rate of the F-wave was significantly higher during muscle contraction than rest, whereas no significant difference was observed in F-wave latency between muscle contraction and rest. Furthermore, the P25 amplitude of SEPs was significantly lower during muscle contraction than rest, whereas the N20 amplitude of SEPs exhibited no significant differences. The SPS was significantly lower during muscle contraction than rest CONCLUSIONS: We conclude that sensory gating, which is found in the P25 component of SEPs during muscle contraction, is one of the neurophysiological mechanisms underlying the suppression of SPS.
ISSN:1471-2202
1471-2202
DOI:10.1186/s12868-020-00592-2