The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability

Motor evoked potentials (MEPs) evoked by transcranial magnetic stimulation (TMS) a few milliseconds after this cortical activity following electrical stimulation (ES) result in an inhibition comparable to that by TMS alone; this is called short-latency afferent inhibition (SAI). Cortical activity is...

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Autores principales:	Sho Kojima, Shota Miyaguchi, Hirotake Yokota, Kei Saito, Yasuto Inukai, Naofumi Otsuru, Hideaki Onishi
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	transcranial magnetic stimulation mechanical tactile stimulation electrical stimulation short-latency afferent stimulation Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
Acceso en línea:	https://doaj.org/article/4a65cb52601e4ad4b779a967314ab749
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spelling	oai:doaj.org-article:4a65cb52601e4ad4b779a967314ab7492021-11-25T16:58:26ZThe Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability10.3390/brainsci111114942076-3425https://doaj.org/article/4a65cb52601e4ad4b779a967314ab7492021-11-01T00:00:00Zhttps://www.mdpi.com/2076-3425/11/11/1494https://doaj.org/toc/2076-3425Motor evoked potentials (MEPs) evoked by transcranial magnetic stimulation (TMS) a few milliseconds after this cortical activity following electrical stimulation (ES) result in an inhibition comparable to that by TMS alone; this is called short-latency afferent inhibition (SAI). Cortical activity is observed after mechanical tactile stimulation (MS) and is affected by the number of stimuli by ES. We determined the effects of somatosensory stimulus methods and multiple conditioning stimuli on SAI in 19 participants. In experiment 1, the interstimulus intervals between the conditioning stimulation and TMS were 25, 27 and 29 ms for ES and 28, 30 and 32 ms for MS. In experiment 2, we used 1, 2, 3 and 4 conditioning stimulations of ES and MS. The interstimulus interval between the ES or MS and TMS was 27 or 30 ms, respectively. In experiment 1, MEPs were significantly decreased in both the ES and MS conditions. In experiment 2, MEPs after ES were significantly decreased in all conditions. Conversely, MEPs after MS were significantly decreased after one stimulus and increased after four stimulations, indicating the SAI according to the number of stimuli. Therefore, the somatosensory stimulus methods and multiple conditioning stimuli affected the SAI.Sho KojimaShota MiyaguchiHirotake YokotaKei SaitoYasuto InukaiNaofumi OtsuruHideaki OnishiMDPI AGarticletranscranial magnetic stimulationmechanical tactile stimulationelectrical stimulationshort-latency afferent stimulationNeurosciences. Biological psychiatry. NeuropsychiatryRC321-571ENBrain Sciences, Vol 11, Iss 1494, p 1494 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	transcranial magnetic stimulation mechanical tactile stimulation electrical stimulation short-latency afferent stimulation Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571
spellingShingle	transcranial magnetic stimulation mechanical tactile stimulation electrical stimulation short-latency afferent stimulation Neurosciences. Biological psychiatry. Neuropsychiatry RC321-571 Sho Kojima Shota Miyaguchi Hirotake Yokota Kei Saito Yasuto Inukai Naofumi Otsuru Hideaki Onishi The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
description	Motor evoked potentials (MEPs) evoked by transcranial magnetic stimulation (TMS) a few milliseconds after this cortical activity following electrical stimulation (ES) result in an inhibition comparable to that by TMS alone; this is called short-latency afferent inhibition (SAI). Cortical activity is observed after mechanical tactile stimulation (MS) and is affected by the number of stimuli by ES. We determined the effects of somatosensory stimulus methods and multiple conditioning stimuli on SAI in 19 participants. In experiment 1, the interstimulus intervals between the conditioning stimulation and TMS were 25, 27 and 29 ms for ES and 28, 30 and 32 ms for MS. In experiment 2, we used 1, 2, 3 and 4 conditioning stimulations of ES and MS. The interstimulus interval between the ES or MS and TMS was 27 or 30 ms, respectively. In experiment 1, MEPs were significantly decreased in both the ES and MS conditions. In experiment 2, MEPs after ES were significantly decreased in all conditions. Conversely, MEPs after MS were significantly decreased after one stimulus and increased after four stimulations, indicating the SAI according to the number of stimuli. Therefore, the somatosensory stimulus methods and multiple conditioning stimuli affected the SAI.
format	article
author	Sho Kojima Shota Miyaguchi Hirotake Yokota Kei Saito Yasuto Inukai Naofumi Otsuru Hideaki Onishi
author_facet	Sho Kojima Shota Miyaguchi Hirotake Yokota Kei Saito Yasuto Inukai Naofumi Otsuru Hideaki Onishi
author_sort	Sho Kojima
title	The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
title_short	The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
title_full	The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
title_fullStr	The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
title_full_unstemmed	The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability
title_sort	number or type of stimuli used for somatosensory stimulation affected the modulation of corticospinal excitability
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/4a65cb52601e4ad4b779a967314ab749
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The Number or Type of Stimuli Used for Somatosensory Stimulation Affected the Modulation of Corticospinal Excitability

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