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Neurological Sciences
Published in: Neurological Sciences 2/2021

01-02-2021 | Electromyographic | Original Article

Modulation of the excitatory phase following the cutaneous silent period by vibration

Authors: Ayşegül Gündüz, Selahattin Ayas, Markus Kofler, Şenay Aydın, Meral Erdemir Kızıltan

Published in: Neurological Sciences | Issue 2/2021

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Abstract

Introduction

The post-inhibition excitatory phase (E3) of the cutaneous silent period (CSP) is attributed to the resynchronization of motoneuron activity following the inhibitory period but there is also evidence that a somatosensory startle reflex may contribute to this phase. We hypothesized that the startle reflex component contained in E3 will decrease during vibration.

Methods

Sixteen healthy individuals were included in the study. CSP was recorded from slightly contracted right thenar muscles after painful index finger stimulation, before, during, and immediately after vibration. The values of the percentage change of E3 relative to pre-stimulus baseline (E3%) were compared before, during, and after vibration for each individual.

Results

There was a reduction in E3% during vibration and the values returned to normal immediately after vibration (153.1 ± 43.5%, 115.2 ± 30.2%, 154.9 ± 68.2%, respectively; p = 0.030).

Discussion

E3 is reduced during vibration in healthy individuals, presumably due to suppression of a reflex component, which is superimposed upon the known resynchronization of motoneurons.
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Metadata
Title
Modulation of the excitatory phase following the cutaneous silent period by vibration
Authors
Ayşegül Gündüz
Selahattin Ayas
Markus Kofler
Şenay Aydın
Meral Erdemir Kızıltan
Publication date
01-02-2021
Publisher
Springer International Publishing
Published in
Neurological Sciences / Issue 2/2021
Print ISSN: 1590-1874
Electronic ISSN: 1590-3478
DOI
https://doi.org/10.1007/s10072-020-04557-5

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