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Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin

Here we asked whether, similar to visual and auditory event-related potentials (ERPs), somatosensory ERPs reflect affect. Participants were stroked on hairy or glabrous skin at five stroking velocities (0.5, 1, 3, 10 and 20 cm/s). For stroking of hairy skin, pleasantness ratings related to velocity...

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Autores principales: Schirmer, Annett, Lai, Oscar, McGlone, Francis, Cham, Clare, Lau, Darwin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9433843/
https://www.ncbi.nlm.nih.gov/pubmed/35277720
http://dx.doi.org/10.1093/scan/nsac012
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author Schirmer, Annett
Lai, Oscar
McGlone, Francis
Cham, Clare
Lau, Darwin
author_facet Schirmer, Annett
Lai, Oscar
McGlone, Francis
Cham, Clare
Lau, Darwin
author_sort Schirmer, Annett
collection PubMed
description Here we asked whether, similar to visual and auditory event-related potentials (ERPs), somatosensory ERPs reflect affect. Participants were stroked on hairy or glabrous skin at five stroking velocities (0.5, 1, 3, 10 and 20 cm/s). For stroking of hairy skin, pleasantness ratings related to velocity in an inverted u-shaped manner. ERPs showed a negativity at 400 ms following touch onset over somatosensory cortex contra-lateral to the stimulation site. This negativity, referred to as sN400, was larger for intermediate than for faster and slower velocities and positively predicted pleasantness ratings. For stroking of glabrous skin, pleasantness showed again an inverted u-shaped relation with velocity and, additionally, increased linearly with faster stroking. The sN400 revealed no quadratic effect and instead was larger for faster velocities. Its amplitude failed to significantly predict pleasantness. In sum, as was reported for other senses, a touch’s affective value modulates the somatosensory ERP. Notably, however, this ERP and associated subjective pleasantness dissociate between hairy and glabrous skin underscoring functional differences between the skin with which we typically receive touch and the skin with which we typically reach out to touch.
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spelling pubmed-94338432022-09-01 Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin Schirmer, Annett Lai, Oscar McGlone, Francis Cham, Clare Lau, Darwin Soc Cogn Affect Neurosci Original Manuscript Here we asked whether, similar to visual and auditory event-related potentials (ERPs), somatosensory ERPs reflect affect. Participants were stroked on hairy or glabrous skin at five stroking velocities (0.5, 1, 3, 10 and 20 cm/s). For stroking of hairy skin, pleasantness ratings related to velocity in an inverted u-shaped manner. ERPs showed a negativity at 400 ms following touch onset over somatosensory cortex contra-lateral to the stimulation site. This negativity, referred to as sN400, was larger for intermediate than for faster and slower velocities and positively predicted pleasantness ratings. For stroking of glabrous skin, pleasantness showed again an inverted u-shaped relation with velocity and, additionally, increased linearly with faster stroking. The sN400 revealed no quadratic effect and instead was larger for faster velocities. Its amplitude failed to significantly predict pleasantness. In sum, as was reported for other senses, a touch’s affective value modulates the somatosensory ERP. Notably, however, this ERP and associated subjective pleasantness dissociate between hairy and glabrous skin underscoring functional differences between the skin with which we typically receive touch and the skin with which we typically reach out to touch. Oxford University Press 2022-02-21 /pmc/articles/PMC9433843/ /pubmed/35277720 http://dx.doi.org/10.1093/scan/nsac012 Text en © The Author(s) 2022. Published by Oxford University Press. https://creativecommons.org/licenses/by-nc/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution-NonCommercial License (https://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com
spellingShingle Original Manuscript
Schirmer, Annett
Lai, Oscar
McGlone, Francis
Cham, Clare
Lau, Darwin
Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title_full Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title_fullStr Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title_full_unstemmed Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title_short Gentle stroking elicits somatosensory ERP that differentiates between hairy and glabrous skin
title_sort gentle stroking elicits somatosensory erp that differentiates between hairy and glabrous skin
topic Original Manuscript
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9433843/
https://www.ncbi.nlm.nih.gov/pubmed/35277720
http://dx.doi.org/10.1093/scan/nsac012
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