The Complexity Analysis of Postural Sway Signals for Elderly Fallers and Healthy Young Subjects under Single and Dual-task
Attention plays an important role in postural balance control among the elderly fallers. The center of pressure (COP) signals were pre-processed by empirical mode decomposition (EMD), and the reconstructed signals were used to calculate the Complexity Index (CD through multiscale entropy (MSE) analysis. The objective of this study is to compare the CI of postural stability between elderly fallers and healthy young subjects under standing still (single-task) and with additional attention task (dual-task). Higher CI value reflects better postural balance stability. The COP signals were collected from 13 elderly fallers and 15 healthy young subjects under standing still and dual-task conditions. From the perspective of CI, the results showed that attention has a negative influence on postural control in elderly fallers. In the elderly fallers, the CI involved in dual-task COP signals was lower than the CI involved while standing still. These results indicate that elderly fallers lack adaptability to attention influence. Based on comparison results, CI showed its effectiveness in differentiating groups and conditions pertaining to the analysis of COP signals.
multiscale entropy (MSE) elderly fallers complexity index center of pressure (COP) postural stability attention influence
Wen-Hung Yang Bernard C. Jiang
Department of Industrial Engineering and Management, Yuan Ze University, Chung-Li, Taiwan, China
国际会议
The Institute Industrial Engineera Asian Conference 2011(2011年国际工业工程师协会亚洲会议)
上海
英文
229-234
2011-06-10（万方平台首次上网日期，不代表论文的发表时间）