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Postural control in standing: role of vision and additional support

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Title: Postural control in standing: role of vision and additional support
Author(s): Krishnan, Vennila; Aruin, Alexander S.
Subject(s): Posture Anticipatory Compensatory Vision Additional support
Abstract: The purpose of the study was to investigate the availability of vision and additional support on anticipatory (APAs) and compensatory (CPAs) postural adjustments and their interaction. Eight healthy adults were exposed to external perturbations induced at the shoulder level while standing with and without holding onto a walker in full vision and while blindfolded. Electrical activity of the trunk and leg muscles and center of pressure (COPAP) displacements were recorded and quantified within the time intervals typical of APAs and CPAs. The results showed that with full vision, there was no difference in both APAs and CPAs in standing with and without holding onto a walker. With subjects holding onto a walker, CPAs in standing blindfolded were comparable to CPAs in full vision: this was seen in changes in the electrical activity of most of the muscles at the individual muscle, joint, and the muscle group levels as well as in COPAP displacements. The findings suggest that: (1) in conditions where vision is available, vision overrules simultaneously available proprioceptive information from the support, (2) while in conditions where vision is not available, proprioceptive information from the support or support itself could be substituted for vision. It is possible to suggest that using a non stabilizing support could be a valuable strategy to improve postural control when visual information is not available or compromised.
Issue Date: 2011-07
Publisher: Springer Verlag
Citation Info: Krishnan, V; Aruin AS. Postural control in response to a perturbation: role of vision and additional support. Exp Brain Res. 2011 Jul;212(3):385-97. DOI: 10.1007/s00221-011-2738-4
Type: Article
Description: The original publication is available at www.springerlink.com in Experimental Brain Research © 2011 Springer Verlag; DOI: 10.1007/s00221-011-2738-4
URI: http://hdl.handle.net/10027/8333
Sponsor: This work was supported in part by NIDRR grant H133P060003.
Date Available in INDIGO: 2012-05-27
 

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