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Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry
The use of visual feedback in gait rehabilitation has been suggested to promote recovery of locomotor function by incorporating interactive visual components. Our prior work demonstrated that visual feedback distortion of changes in step length symmetry entails an implicit or unconscious adaptive pr...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Frontiers Media S.A.
2018
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5879130/ https://www.ncbi.nlm.nih.gov/pubmed/29632481 http://dx.doi.org/10.3389/fnhum.2018.00114 |
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author | Maestas, Gabrielle Hu, Jiyao Trevino, Jessica Chunduru, Pranathi Kim, Seung-Jae Lee, Hyunglae |
author_facet | Maestas, Gabrielle Hu, Jiyao Trevino, Jessica Chunduru, Pranathi Kim, Seung-Jae Lee, Hyunglae |
author_sort | Maestas, Gabrielle |
collection | PubMed |
description | The use of visual feedback in gait rehabilitation has been suggested to promote recovery of locomotor function by incorporating interactive visual components. Our prior work demonstrated that visual feedback distortion of changes in step length symmetry entails an implicit or unconscious adaptive process in the subjects’ spatial gait patterns. We investigated whether the effect of the implicit visual feedback distortion would persist at three different walking speeds (slow, self-preferred and fast speeds) and how different walking speeds would affect the amount of adaption. In the visual feedback distortion paradigm, visual vertical bars portraying subjects’ step lengths were distorted so that subjects perceived their step lengths to be asymmetric during testing. Measuring the adjustments in step length during the experiment showed that healthy subjects made spontaneous modulations away from actual symmetry in response to the implicit visual distortion, no matter the walking speed. In all walking scenarios, the effects of implicit distortion became more significant at higher distortion levels. In addition, the amount of adaptation induced by the visual distortion was significantly greater during walking at preferred or slow speed than at the fast speed. These findings indicate that although a link exists between supraspinal function through visual system and human locomotion, sensory feedback control for locomotion is speed-dependent. Ultimately, our results support the concept that implicit visual feedback can act as a dominant form of feedback in gait modulation, regardless of speed. |
format | Online Article Text |
id | pubmed-5879130 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2018 |
publisher | Frontiers Media S.A. |
record_format | MEDLINE/PubMed |
spelling | pubmed-58791302018-04-09 Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry Maestas, Gabrielle Hu, Jiyao Trevino, Jessica Chunduru, Pranathi Kim, Seung-Jae Lee, Hyunglae Front Hum Neurosci Neuroscience The use of visual feedback in gait rehabilitation has been suggested to promote recovery of locomotor function by incorporating interactive visual components. Our prior work demonstrated that visual feedback distortion of changes in step length symmetry entails an implicit or unconscious adaptive process in the subjects’ spatial gait patterns. We investigated whether the effect of the implicit visual feedback distortion would persist at three different walking speeds (slow, self-preferred and fast speeds) and how different walking speeds would affect the amount of adaption. In the visual feedback distortion paradigm, visual vertical bars portraying subjects’ step lengths were distorted so that subjects perceived their step lengths to be asymmetric during testing. Measuring the adjustments in step length during the experiment showed that healthy subjects made spontaneous modulations away from actual symmetry in response to the implicit visual distortion, no matter the walking speed. In all walking scenarios, the effects of implicit distortion became more significant at higher distortion levels. In addition, the amount of adaptation induced by the visual distortion was significantly greater during walking at preferred or slow speed than at the fast speed. These findings indicate that although a link exists between supraspinal function through visual system and human locomotion, sensory feedback control for locomotion is speed-dependent. Ultimately, our results support the concept that implicit visual feedback can act as a dominant form of feedback in gait modulation, regardless of speed. Frontiers Media S.A. 2018-03-26 /pmc/articles/PMC5879130/ /pubmed/29632481 http://dx.doi.org/10.3389/fnhum.2018.00114 Text en Copyright © 2018 Maestas, Hu, Trevino, Chunduru, Kim and Lee. http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. |
spellingShingle | Neuroscience Maestas, Gabrielle Hu, Jiyao Trevino, Jessica Chunduru, Pranathi Kim, Seung-Jae Lee, Hyunglae Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title | Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title_full | Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title_fullStr | Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title_full_unstemmed | Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title_short | Walking Speed Influences the Effects of Implicit Visual Feedback Distortion on Modulation of Gait Symmetry |
title_sort | walking speed influences the effects of implicit visual feedback distortion on modulation of gait symmetry |
topic | Neuroscience |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5879130/ https://www.ncbi.nlm.nih.gov/pubmed/29632481 http://dx.doi.org/10.3389/fnhum.2018.00114 |
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