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Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence

Cutaneous foot receptors are important for balance control, and their activation during quiet standing depends on the speed and the amplitude of postural oscillations. We hypothesized that the transmission of cutaneous input to the cortex is reduced during prolonged small postural sways due to recep...

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Autores principales: Fabre, Marie, Antoine, Marine, Robitaille, Mathieu Germain, Ribot-Ciscar, Edith, Ackerley, Rochelle, Aimonetti, Jean-Marc, Chavet, Pascale, Blouin, Jean, Simoneau, Martin, Mouchnino, Laurence
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Oxford University Press 2020
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Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8152841/
https://www.ncbi.nlm.nih.gov/pubmed/34296149
http://dx.doi.org/10.1093/texcom/tgaa094
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author Fabre, Marie
Antoine, Marine
Robitaille, Mathieu Germain
Ribot-Ciscar, Edith
Ackerley, Rochelle
Aimonetti, Jean-Marc
Chavet, Pascale
Blouin, Jean
Simoneau, Martin
Mouchnino, Laurence
author_facet Fabre, Marie
Antoine, Marine
Robitaille, Mathieu Germain
Ribot-Ciscar, Edith
Ackerley, Rochelle
Aimonetti, Jean-Marc
Chavet, Pascale
Blouin, Jean
Simoneau, Martin
Mouchnino, Laurence
author_sort Fabre, Marie
collection PubMed
description Cutaneous foot receptors are important for balance control, and their activation during quiet standing depends on the speed and the amplitude of postural oscillations. We hypothesized that the transmission of cutaneous input to the cortex is reduced during prolonged small postural sways due to receptor adaptation during continued skin compression. Central mechanisms would trigger large sways to reactivate the receptors. We compared the amplitude of positive and negative post-stimulation peaks (P(50)N(90)) somatosensory cortical potentials evoked by the electrical stimulation of the foot sole during small and large sways in 16 young adults standing still with their eyes closed. We observed greater P(50)N(90) amplitudes during large sways compared with small sways consistent with increased cutaneous transmission during large sways. Postural oscillations computed 200 ms before large sways had smaller amplitudes than those before small sways, providing sustained compression within a small foot sole area. Cortical source analyses revealed that during this interval, the activity of the somatosensory areas decreased, whereas the activity of cortical areas engaged in motor planning (supplementary motor area, dorsolateral prefrontal cortex) increased. We concluded that large sways during quiet standing represent self-generated functional behavior aiming at releasing skin compression to reactivate mechanoreceptors. Such balance motor commands create sensory reafference that help control postural sway.
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spelling pubmed-81528412021-07-21 Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence Fabre, Marie Antoine, Marine Robitaille, Mathieu Germain Ribot-Ciscar, Edith Ackerley, Rochelle Aimonetti, Jean-Marc Chavet, Pascale Blouin, Jean Simoneau, Martin Mouchnino, Laurence Cereb Cortex Commun Original Article Cutaneous foot receptors are important for balance control, and their activation during quiet standing depends on the speed and the amplitude of postural oscillations. We hypothesized that the transmission of cutaneous input to the cortex is reduced during prolonged small postural sways due to receptor adaptation during continued skin compression. Central mechanisms would trigger large sways to reactivate the receptors. We compared the amplitude of positive and negative post-stimulation peaks (P(50)N(90)) somatosensory cortical potentials evoked by the electrical stimulation of the foot sole during small and large sways in 16 young adults standing still with their eyes closed. We observed greater P(50)N(90) amplitudes during large sways compared with small sways consistent with increased cutaneous transmission during large sways. Postural oscillations computed 200 ms before large sways had smaller amplitudes than those before small sways, providing sustained compression within a small foot sole area. Cortical source analyses revealed that during this interval, the activity of the somatosensory areas decreased, whereas the activity of cortical areas engaged in motor planning (supplementary motor area, dorsolateral prefrontal cortex) increased. We concluded that large sways during quiet standing represent self-generated functional behavior aiming at releasing skin compression to reactivate mechanoreceptors. Such balance motor commands create sensory reafference that help control postural sway. Oxford University Press 2020-12-28 /pmc/articles/PMC8152841/ /pubmed/34296149 http://dx.doi.org/10.1093/texcom/tgaa094 Text en © The Author(s) 2020. Published by Oxford University Press. https://creativecommons.org/licenses/by/4.0/This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/ (https://creativecommons.org/licenses/by/4.0/) ), which permits unrestricted reuse, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Original Article
Fabre, Marie
Antoine, Marine
Robitaille, Mathieu Germain
Ribot-Ciscar, Edith
Ackerley, Rochelle
Aimonetti, Jean-Marc
Chavet, Pascale
Blouin, Jean
Simoneau, Martin
Mouchnino, Laurence
Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title_full Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title_fullStr Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title_full_unstemmed Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title_short Large Postural Sways Prevent Foot Tactile Information From Fading: Neurophysiological Evidence
title_sort large postural sways prevent foot tactile information from fading: neurophysiological evidence
topic Original Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8152841/
https://www.ncbi.nlm.nih.gov/pubmed/34296149
http://dx.doi.org/10.1093/texcom/tgaa094
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