标题：Effects of ageing on structural variability of EMG in lower-limb muscles during quite standing
作者：Wang, Wei ;Li, Ke ;Wei, Na ;Yue, Shouwei ;Zhang, Yang ;Yin, Cuiping
作者机构：[Wang, Wei ;Li, Ke ] Laboratory of Motor Control and Rehabilitation, Department of Biomedical Engineering, School of Control Science and Engineering, 更多
会议名称：10th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2017
会议日期：14 October 2017 through 16 October 2017
来源：Proceedings - 2017 10th International Congress on Image and Signal Processing, BioMedical Engineering and Informatics, CISP-BMEI 2017
关键词：ageing; detrended fluctuation analysis; electromyography; standing balance; structural variability
摘要：The objective of this study was to investigate the structural variability of electromyography (EMG) and the correlations of structural variability across the bilateral EMGs in lower extremity during quite standing in the elderly individuals. Ten young subjects and 10 older adults volunteered to participate in this study. Eight channels of EMG signals from tibialis anterior (TIB), soleus (SOL), medial gastrocnemius (MGS) and lateral gastrocnemius (LGS) in both the left and right lower limbs were recorded when each subject was standing upon a force plate during 1 min, with their eyes open (EO) for the first 30 s and with their eyes closed (EC) for the second 30 s. Results showed that the RMS of TIB in elderly group was significantly higher than that of young group under the EC condition (p < 0.05). Removal of vision increased the RMS of TIB (p < 0.05) and MGS (p < 0.05) in older adults and the RMS of SOL (p < 0.01) and MGS (p < 0.001) in young subjects. The older adults showed significantly lower αDFA values of TIB and SOL than those of young subjects (p < 0.05) with EO. There were lower αDCCA of SOL with EO and lower αDCCA of MGS with both EO and EC in the elderly group compared with the young group (p < 0.05). The αDCCA of SOL in the young group decreased after vision removed (p < 0.05). The loss of structural variability of EMG may contribute to the standing instability, which can provide reference for the clinical rehabilitation of standing balance in the elderly adults. © 2017 IEEE.