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Morning/Evening Differences in Somatosensory Inputs for Postural Control

The underlying processes responsible for the differences between morning and afternoon measurements of postural control have not yet been clearly identified. This study was conducted to specify the role played by vestibular, visual, and somatosensory inputs in postural balance and their link with th...

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Autores principales: Bougard, Clément, Davenne, Damien
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Hindawi Publishing Corporation 2014
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4151602/
https://www.ncbi.nlm.nih.gov/pubmed/25210709
http://dx.doi.org/10.1155/2014/287436
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author Bougard, Clément
Davenne, Damien
author_facet Bougard, Clément
Davenne, Damien
author_sort Bougard, Clément
collection PubMed
description The underlying processes responsible for the differences between morning and afternoon measurements of postural control have not yet been clearly identified. This study was conducted to specify the role played by vestibular, visual, and somatosensory inputs in postural balance and their link with the diurnal fluctuations of body temperature and vigilance level. Nineteen healthy male subjects (mean age: 20.5 ± 1.3 years) participated in test sessions at 6:00 a.m. and 6:00 p.m. after a normal night's sleep. Temperature was measured before the subjects completed a sign cancellation test and a postural control evaluation with eyes both open and closed. Our results confirmed that postural control improved throughout the day according to the circadian rhythm of body temperature and sleepiness/vigilance. The path length as a function of surface ratio increased between 6:00 a.m. and 6:00 p.m. This is due to a decrease in the centre-of-pressure surface area, which is associated with an increase in path length. Romberg's index did not change throughout the day; however, the spectral analysis (fast Fourier transform) of the centre-of-pressure excursions (in anteroposterior and mediolateral directions) indicated that diurnal fluctuations in postural control may occur via changes in the different processes responsible for readjustment via muscle contractions.
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spelling pubmed-41516022014-09-10 Morning/Evening Differences in Somatosensory Inputs for Postural Control Bougard, Clément Davenne, Damien Biomed Res Int Research Article The underlying processes responsible for the differences between morning and afternoon measurements of postural control have not yet been clearly identified. This study was conducted to specify the role played by vestibular, visual, and somatosensory inputs in postural balance and their link with the diurnal fluctuations of body temperature and vigilance level. Nineteen healthy male subjects (mean age: 20.5 ± 1.3 years) participated in test sessions at 6:00 a.m. and 6:00 p.m. after a normal night's sleep. Temperature was measured before the subjects completed a sign cancellation test and a postural control evaluation with eyes both open and closed. Our results confirmed that postural control improved throughout the day according to the circadian rhythm of body temperature and sleepiness/vigilance. The path length as a function of surface ratio increased between 6:00 a.m. and 6:00 p.m. This is due to a decrease in the centre-of-pressure surface area, which is associated with an increase in path length. Romberg's index did not change throughout the day; however, the spectral analysis (fast Fourier transform) of the centre-of-pressure excursions (in anteroposterior and mediolateral directions) indicated that diurnal fluctuations in postural control may occur via changes in the different processes responsible for readjustment via muscle contractions. Hindawi Publishing Corporation 2014 2014-08-18 /pmc/articles/PMC4151602/ /pubmed/25210709 http://dx.doi.org/10.1155/2014/287436 Text en Copyright © 2014 C. Bougard and D. Davenne. https://creativecommons.org/licenses/by/3.0/ This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
spellingShingle Research Article
Bougard, Clément
Davenne, Damien
Morning/Evening Differences in Somatosensory Inputs for Postural Control
title Morning/Evening Differences in Somatosensory Inputs for Postural Control
title_full Morning/Evening Differences in Somatosensory Inputs for Postural Control
title_fullStr Morning/Evening Differences in Somatosensory Inputs for Postural Control
title_full_unstemmed Morning/Evening Differences in Somatosensory Inputs for Postural Control
title_short Morning/Evening Differences in Somatosensory Inputs for Postural Control
title_sort morning/evening differences in somatosensory inputs for postural control
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4151602/
https://www.ncbi.nlm.nih.gov/pubmed/25210709
http://dx.doi.org/10.1155/2014/287436
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