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Balance control during continuous rotational perturbations of the support surface

Akram, S. B. and Frank, J. S. and Patla, A. E. and Allum, J. H.. (2008) Balance control during continuous rotational perturbations of the support surface. Gait Posture, Vol. 27. pp. 393-398.

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Official URL: http://edoc.unibas.ch/dok/A6004186

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Abstract

This research investigated the effects of continuous rotational perturbations of the support surface on postural control strategies adopted to maintain upright stance. Four different sinusoidal rotations of the support surface were employed: 0.5 Hz, at 2 degrees; 1.0 Hz at 1 degrees; 1.5 Hz at 4 degrees; and 2 Hz at 3 degrees. Thereby two different velocities of perturbation were obtained: 3.1 degrees s(-1) for 0.5 and 1 Hz, and 18.9 degrees s(-1) for 1.5 and 2 Hz. Results indicate that for the frequencies tested, the effect of the perturbation was attenuated. The amplitude of the body's center of mass (COM) displacement was reduced by adopting a multi-segmental strategy which employed anti-phase ankle and hip joint motion. Our results suggest that at least a two-link model of human stance is required to explain responses when the support surface is rotating.
Faculties and Departments:03 Faculty of Medicine > Bereich Spezialf├Ącher (Klinik) > Otorhinolaryngologie > Experimentelle Neurootologie und Audiologie (Allum)
03 Faculty of Medicine > Departement Klinische Forschung > Bereich Spezialf├Ącher (Klinik) > Otorhinolaryngologie > Experimentelle Neurootologie und Audiologie (Allum)
UniBasel Contributors:Allum, John H.J.
Item Type:Article, refereed
Article Subtype:Research Article
Bibsysno:Link to catalogue
Publisher:Elsevier
ISSN:0966-6362
Note:Publication type according to Uni Basel Research Database: Journal article
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Last Modified:08 Nov 2012 16:22
Deposited On:08 Nov 2012 16:09

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