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Journal of Healthcare Engineering - Volume 2016 2016, Article ID 1621562, 9 pages -

Research Article

Faculty of Biomedical Engineering, Czech Technical University in Prague, 272 01 Kladno, Czech Republic

Department of Rehabilitation and Spa Medicine, Faculty of Medicine, P. J. Šafárik University in Košice, 040 01 Košice, Slovakia

Palacky University of Olomouc, Faculty of Physical Culture, 771 11 Olomouc, Czech Republic

Received 1 May 2015; Revised 1 February 2016; Accepted 29 March 2016

Academic Editor: Jiann-Shing Shieh

Copyright © 2016 Roman Melecky et al. 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.


Techniques to quantify postural stability usually rely on the evaluation of only two variables, that is, two coordinates of COP. However, by using three variables, that is, three components of acceleration vector, it is possible to describe human movement more precisely. For this purpose, a single three-axis accelerometer was used, making it possible to evaluate 3D movement by use of a novel method, convex polyhedron CP, together with a traditional method, based on area of the confidence ellipse ACE. Ten patients Pts with cerebellar ataxia and eleven healthy individuals of control group CG participated in the study. The results show a significant increase of volume of the CP CPV in Pts or CG standing on foam surface with eyes open EO and eyes closed EC after the EC phase. Significant difference between Pts and CG was found in all cases as well. Correlation coefficient indicates strong correlation between the CPV and ACE in most cases of patient examinations, thus confirming the possibility of quantification of postural instability by the introduced method of CPV.

Autor: Roman Melecky, Vladimir Socha, Patrik Kutilek, Lenka Hanakova, Peter Takac, Jakub Schlenker, and Zdenek Svoboda

Fuente: https://www.hindawi.com/


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