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Quality of Visual Cue Affects Visual Reweighting in Quiet Standing

Sensory reweighting is a characteristic of postural control functioning adopted to accommodate environmental changes. The use of mono or binocular cues induces visual reduction/increment of moving room influences on postural sway, suggesting a visual reweighting due to the quality of available senso...

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Autores principales: Moraes, Renato, de Freitas, Paulo Barbosa, Razuk, Milena, Barela, José Angelo
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2016
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4777428/
https://www.ncbi.nlm.nih.gov/pubmed/26939058
http://dx.doi.org/10.1371/journal.pone.0150158
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author Moraes, Renato
de Freitas, Paulo Barbosa
Razuk, Milena
Barela, José Angelo
author_facet Moraes, Renato
de Freitas, Paulo Barbosa
Razuk, Milena
Barela, José Angelo
author_sort Moraes, Renato
collection PubMed
description Sensory reweighting is a characteristic of postural control functioning adopted to accommodate environmental changes. The use of mono or binocular cues induces visual reduction/increment of moving room influences on postural sway, suggesting a visual reweighting due to the quality of available sensory cues. Because in our previous study visual conditions were set before each trial, participants could adjust the weight of the different sensory systems in an anticipatory manner based upon the reduction in quality of the visual information. Nevertheless, in daily situations this adjustment is a dynamical process and occurs during ongoing movement. The purpose of this study was to examine the effect of visual transitions in the coupling between visual information and body sway in two different distances from the front wall of a moving room. Eleven young adults stood upright inside of a moving room in two distances (75 and 150 cm) wearing a liquid crystal lenses goggles, which allow individual lenses transition from opaque to transparent and vice-versa. Participants stood still during five minutes for each trial and the lenses status changed every one minute (no vision to binocular vision, no vision to monocular vision, binocular vision to monocular vision, and vice-versa). Results showed that farther distance and monocular vision reduced the effect of visual manipulation on postural sway. The effect of visual transition was condition dependent, with a stronger effect when transitions involved binocular vision than monocular vision. Based upon these results, we conclude that the increased distance from the front wall of the room reduced the effect of visual manipulation on postural sway and that sensory reweighting is stimulus quality dependent, with binocular vision producing a much stronger down/up-weighting than monocular vision.
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spelling pubmed-47774282016-03-10 Quality of Visual Cue Affects Visual Reweighting in Quiet Standing Moraes, Renato de Freitas, Paulo Barbosa Razuk, Milena Barela, José Angelo PLoS One Research Article Sensory reweighting is a characteristic of postural control functioning adopted to accommodate environmental changes. The use of mono or binocular cues induces visual reduction/increment of moving room influences on postural sway, suggesting a visual reweighting due to the quality of available sensory cues. Because in our previous study visual conditions were set before each trial, participants could adjust the weight of the different sensory systems in an anticipatory manner based upon the reduction in quality of the visual information. Nevertheless, in daily situations this adjustment is a dynamical process and occurs during ongoing movement. The purpose of this study was to examine the effect of visual transitions in the coupling between visual information and body sway in two different distances from the front wall of a moving room. Eleven young adults stood upright inside of a moving room in two distances (75 and 150 cm) wearing a liquid crystal lenses goggles, which allow individual lenses transition from opaque to transparent and vice-versa. Participants stood still during five minutes for each trial and the lenses status changed every one minute (no vision to binocular vision, no vision to monocular vision, binocular vision to monocular vision, and vice-versa). Results showed that farther distance and monocular vision reduced the effect of visual manipulation on postural sway. The effect of visual transition was condition dependent, with a stronger effect when transitions involved binocular vision than monocular vision. Based upon these results, we conclude that the increased distance from the front wall of the room reduced the effect of visual manipulation on postural sway and that sensory reweighting is stimulus quality dependent, with binocular vision producing a much stronger down/up-weighting than monocular vision. Public Library of Science 2016-03-03 /pmc/articles/PMC4777428/ /pubmed/26939058 http://dx.doi.org/10.1371/journal.pone.0150158 Text en © 2016 Moraes et al http://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/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Moraes, Renato
de Freitas, Paulo Barbosa
Razuk, Milena
Barela, José Angelo
Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title_full Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title_fullStr Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title_full_unstemmed Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title_short Quality of Visual Cue Affects Visual Reweighting in Quiet Standing
title_sort quality of visual cue affects visual reweighting in quiet standing
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4777428/
https://www.ncbi.nlm.nih.gov/pubmed/26939058
http://dx.doi.org/10.1371/journal.pone.0150158
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