Postural mechanisms to control body ...
Document type :
Article dans une revue scientifique
PMID :
Permalink :
Title :
Postural mechanisms to control body displacements in the performance of lateral gaze shifts.
Author(s) :
Bonnet, Cédrick T. [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Morio, Cédric [Auteur]
Szaffarczyk, Sébastien [Auteur]
Rougier, Patrice R [Auteur]
Laboratoire de Neurosciences Fonctionnelles et Pathologies [LNFP]
Morio, Cédric [Auteur]
Szaffarczyk, Sébastien [Auteur]
Rougier, Patrice R [Auteur]
Journal title :
Journal of motor behavior
Abbreviated title :
J Mot Behav
Volume number :
46
Pages :
397-405
Publication date :
2014
ISSN :
1940-1027
English keyword(s) :
Eye Movements
Fixation
Ocular
Head Movements
Humans
Movement
Postural Balance
Psychomotor Performance
Young Adult
medialateral axis
postural control mechanisms
postural coordination
visual tasks
Fixation
Ocular
Head Movements
Humans
Movement
Postural Balance
Psychomotor Performance
Young Adult
medialateral axis
postural control mechanisms
postural coordination
visual tasks
HAL domain(s) :
Sciences cognitives
English abstract : [en]
Medialateral postural control mechanisms (bodyweight distribution and center of pressure location) have been studied in static conditions. Our objective was to determine how these mechanisms are adjusted to perform voluntary ...
Show more >Medialateral postural control mechanisms (bodyweight distribution and center of pressure location) have been studied in static conditions. Our objective was to determine how these mechanisms are adjusted to perform voluntary movements, in our case 80° lateral gaze shifts at 0.125 Hz and 0.25 Hz. In healthy, young adults, we expected body marker (neck, lower back) and center of pressure displacements to be significantly greater in gaze shift conditions than in the stationary gaze condition. To explain these changes in center of pressure displacement, the amplitude contribution of both mechanisms was expected to increase significantly. All these results were found accordingly. Unexpectedly, the active contribution of the bodyweight distribution mechanism was negatively related to body marker displacements in the gaze shift conditions (ns in stationary condition). Moreover, changes in the contribution of the mechanisms were statistically weaker in effect size than changes in body displacement. However, the participants were not unstable because they performed the visual tasks as requested. We propose that the strength of medialateral postural control mechanisms may not only be strengthened to control challenging ML stance conditions but also slightly weakened to allow the performance of adequate body motions in ongoing tasks.Show less >
Show more >Medialateral postural control mechanisms (bodyweight distribution and center of pressure location) have been studied in static conditions. Our objective was to determine how these mechanisms are adjusted to perform voluntary movements, in our case 80° lateral gaze shifts at 0.125 Hz and 0.25 Hz. In healthy, young adults, we expected body marker (neck, lower back) and center of pressure displacements to be significantly greater in gaze shift conditions than in the stationary gaze condition. To explain these changes in center of pressure displacement, the amplitude contribution of both mechanisms was expected to increase significantly. All these results were found accordingly. Unexpectedly, the active contribution of the bodyweight distribution mechanism was negatively related to body marker displacements in the gaze shift conditions (ns in stationary condition). Moreover, changes in the contribution of the mechanisms were statistically weaker in effect size than changes in body displacement. However, the participants were not unstable because they performed the visual tasks as requested. We propose that the strength of medialateral postural control mechanisms may not only be strengthened to control challenging ML stance conditions but also slightly weakened to allow the performance of adequate body motions in ongoing tasks.Show less >
Language :
Anglais
Audience :
Non spécifiée
Submission date :
2019-06-05T18:15:23Z
2019-07-17T10:40:20Z
2019-07-17T10:40:20Z
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