Relationship between changes in vestibular sensory reweighting and postural control complexity

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• 作者：Brian L. Cone ; Daniel J. Goble ; Christopher K. Rhea
• 关键词：Complexity ; Postural control ; Entropy ; Sensory organization test
• 刊名：Experimental Brain Research
• 出版年：2017
• 出版时间：February 2017
• 年：2017
• 卷：235
• 期：2
• 页码：547-554
• 全文大小：
• 刊物类别：Biomedical and Life Sciences
• 刊物主题：Neurosciences; Neurology;
• 出版者：Springer Berlin Heidelberg
• ISSN：1432-1106
• 卷排序：235

文摘

Complexity measures have become increasingly prominent in the postural control literature. Several studies have found associations between clinical balance improvements and complexity, but the relationship between sensory reweighting and complexity changes has remained unobserved. The purpose of this study was to determine the relationship between sensory reweighting via Wii Fit balance training and complexity. Twenty healthy adults completed 6 weeks of training. Participants completed the sensory organization test (SOT) before and after the sessions. Complexity of postural control was analyzed through sample entropy of the center-of-pressure velocity time series in the resultant, anterior–posterior (AP), and medial–lateral directions, and compared to SOT summary score changes. Significant differences were found between pre- and post-training for the condition five (p < .001, d = .525) and vestibular summary scores (p < .001, d = .611). Similarly, changes in complexity were observed from pre- to post-training in the resultant (p = .040, d = .427) direction. While the AP velocity was not significant (p = .07, d = .355), its effect size was moderate. A moderate correlation was revealed in the posttest between AP complexity and condition 5 (r = .442, p = .05), as well as between AP complexity and the vestibular summary score (r = .351, p = .13). The results of this study show that a moderate relationship exists between postural control complexity and the vestibular system, suggesting that complexity may reflect the neurosensory organization used to maintain upright stance.