Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy

Abstract A wide variety of tactile sensations arise from the activation of several types of mechanoreceptor-afferent channels scattered all over the body, and their projections create a somatotopic map in the somatosensory cortex. Recent findings challenge the traditional view that tactile signals f...

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Autores principales:	Scinob Kuroki, Junji Watanabe, Shin’ya Nishida
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2017
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/68ad609a67104fcd85b78eed6c4af34f
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spelling	oai:doaj.org-article:68ad609a67104fcd85b78eed6c4af34f2021-12-02T15:05:33ZIntegration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy10.1038/s41598-017-02922-72045-2322https://doaj.org/article/68ad609a67104fcd85b78eed6c4af34f2017-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-02922-7https://doaj.org/toc/2045-2322Abstract A wide variety of tactile sensations arise from the activation of several types of mechanoreceptor-afferent channels scattered all over the body, and their projections create a somatotopic map in the somatosensory cortex. Recent findings challenge the traditional view that tactile signals from different mechanoreceptor-channels/locations are independently processed in the brain, though the contribution of signal integration to perception remains obscure. Here we show that vibrotactile frequency perception is functionally enriched by signal integration across different mechanoreceptor channels and separate skin locations. When participants touched two sinusoidal vibrations of far-different frequency, which dominantly activated separate channels with the neighboring fingers or the different hand and judged the frequency of one vibration, the perceived frequency shifted toward the other (assimilation effect). Furthermore, when the participants judged the frequency of the pair as a whole, they consistently reported an intensity-based interpolation of the two vibrations (averaging effect). Both effects were similar in magnitude between the same and different hand conditions and significantly diminished by asynchronous presentation of the vibration pair. These findings indicate that human tactile processing is global and flexible in that it can estimate the ensemble property of a large-scale tactile event sensed by various receptors distributed over the body.Scinob KurokiJunji WatanabeShin’ya NishidaNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-13 (2017)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Scinob Kuroki Junji Watanabe Shin’ya Nishida Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
description	Abstract A wide variety of tactile sensations arise from the activation of several types of mechanoreceptor-afferent channels scattered all over the body, and their projections create a somatotopic map in the somatosensory cortex. Recent findings challenge the traditional view that tactile signals from different mechanoreceptor-channels/locations are independently processed in the brain, though the contribution of signal integration to perception remains obscure. Here we show that vibrotactile frequency perception is functionally enriched by signal integration across different mechanoreceptor channels and separate skin locations. When participants touched two sinusoidal vibrations of far-different frequency, which dominantly activated separate channels with the neighboring fingers or the different hand and judged the frequency of one vibration, the perceived frequency shifted toward the other (assimilation effect). Furthermore, when the participants judged the frequency of the pair as a whole, they consistently reported an intensity-based interpolation of the two vibrations (averaging effect). Both effects were similar in magnitude between the same and different hand conditions and significantly diminished by asynchronous presentation of the vibration pair. These findings indicate that human tactile processing is global and flexible in that it can estimate the ensemble property of a large-scale tactile event sensed by various receptors distributed over the body.
format	article
author	Scinob Kuroki Junji Watanabe Shin’ya Nishida
author_facet	Scinob Kuroki Junji Watanabe Shin’ya Nishida
author_sort	Scinob Kuroki
title	Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
title_short	Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
title_full	Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
title_fullStr	Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
title_full_unstemmed	Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
title_sort	integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy
publisher	Nature Portfolio
publishDate	2017
url	https://doaj.org/article/68ad609a67104fcd85b78eed6c4af34f
work_keys_str_mv	AT scinobkuroki integrationofvibrotactilefrequencyinformationbeyondthemechanoreceptorchannelandsomatotopy AT junjiwatanabe integrationofvibrotactilefrequencyinformationbeyondthemechanoreceptorchannelandsomatotopy AT shinyanishida integrationofvibrotactilefrequencyinformationbeyondthemechanoreceptorchannelandsomatotopy
_version_	1718388769682358272

Integration of vibrotactile frequency information beyond the mechanoreceptor channel and somatotopy

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