Use of motor abundance in old adults in the regulation of a narrow-based stance

Wei Li Hsu*, Kwan Hwa Lin, Rong Sen Yang, Chih Hsiu Cheng

*此作品的通信作者

研究成果: 期刊稿件文章同行評審

32 引文 斯高帕斯(Scopus)

摘要

Purpose: The ability to maintain stable balance while standing decreases with age. The body must coordinate multiple joints using "freeze" or "free" strategy, or a combination of both to ensure balance stability. The purpose of this study was to examine age-related changes in the use of motor abundance during upright stance on a narrow base without visual input. Methods: Uncontrolled manifold (UCM) analysis was used to decompose the movement variability of joints into goal-equivalent variability (GEV) and non-goal-equivalent variability (NGEV). The ratio between GEV and NGEV (UCM ratio) quantifies the joint coordination related to postural stability, and a high UCMratio value indicates flexible control of joints. To perform balance tests, participants in this study (healthy young and old adults, 20 each) were asked to stand on a flat platform and on narrow wooden blocks with their eyes open and then eyes closed. Results: In upright balance tests, both old and young adults maintained postural stability. GEV was greater than NGEV across all participants and conditions. However, GEV was higher in the young adults than in the old adults, whereas NGEV was higher in the old adults than in the young adults. Therefore, the old adults exhibited a lower UCM ratio than the young adults. Conclusion: The old adults were unable to exploit motor abundance and used a less flexible multi-joint coordination pattern to achieve stable balance. The UCMratio value reflects the quality of postural control and can be used for assessing joint coordination in balance disorders.

原文英語
頁(從 - 到)261-271
頁數11
期刊European Journal of Applied Physiology
114
發行號2
DOIs
出版狀態已出版 - 02 2014

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