The Complexity of Standing Postural Control in Older Adults: A Modified   Detrended Fluctuation Analysis Based upon the Empirical Mode   Decomposition Algorithm

doi:10.1371/journal.pone.0062585

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	The Complexity of Standing Postural Control in Older Adults: A Modified Detrended Fluctuation Analysis Based upon the Empirical Mode Decomposition Algorithm
	Zhou, Junhong ; Manor, Brad ; Liu, Dongdong ; Hu, Kun ; Zhang, Jue ; Fang, Jing
刊名	plos one
	2013
关键词	TIME-SERIES ANALYSIS OPEN-LOOP PHYSIOLOGICAL COMPLEXITY CARDIAC DYNAMICS CIRCADIAN-RHYTHM DUAL-TASK STABILITY HEARTBEAT AGE MAGNITUDE
DOI	10.1371/journal.pone.0062585
英文摘要	Human aging into senescence diminishes the capacity of the postural control system to adapt to the stressors of everyday life. Diminished adaptive capacity may be reflected by a loss of the fractal-like, multiscale complexity within the dynamics of standing postural sway (i.e., center-of-pressure, COP). We therefore studied the relationship between COP complexity and adaptive capacity in 22 older and 22 younger healthy adults. COP magnitude dynamics were assessed from raw data during quiet standing with eyes open and closed, and complexity was quantified with a new technique termed empirical mode decomposition embedded detrended fluctuation analysis (EMD-DFA). Adaptive capacity of the postural control system was assessed with the sharpened Romberg test. As compared to traditional DFA, EMD-DFA more accurately identified trends in COP data with intrinsic scales and produced short and long-term scaling exponents (i. e., alpha(Short), alpha(Long)) with greater reliability. The fractal-like properties of COP fluctuations were time-scale dependent and highly complex (i.e., alpha(Short) values were close to one) over relatively short time scales. As compared to younger adults, older adults demonstrated lower short-term COP complexity (i.e., greater alpha(Short) values) in both visual conditions (p>0.001). Closing the eyes decreased short-term COP complexity, yet this decrease was greater in older compared to younger adults (p<0.001). In older adults, those with higher short-term COP complexity exhibited better adaptive capacity as quantified by Romberg test performance (r(2) = 0.38, p<0.001). These results indicate that an age-related loss of COP complexity of magnitude series may reflect a clinically important reduction in postural control system functionality as a new biomarker.; http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000319167000059&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=8e1609b174ce4e31116a60747a720701 ; Multidisciplinary Sciences; SCI(E); PubMed; 2; ARTICLE; 5; e62585; 8
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/164079]
专题	工学院
推荐引用方式 GB/T 7714	Zhou, Junhong,Manor, Brad,Liu, Dongdong,et al. The Complexity of Standing Postural Control in Older Adults: A Modified Detrended Fluctuation Analysis Based upon the Empirical Mode Decomposition Algorithm[J]. plos one,2013.
APA	Zhou, Junhong,Manor, Brad,Liu, Dongdong,Hu, Kun,Zhang, Jue,&Fang, Jing.(2013).The Complexity of Standing Postural Control in Older Adults: A Modified Detrended Fluctuation Analysis Based upon the Empirical Mode Decomposition Algorithm.plos one.
MLA	Zhou, Junhong,et al."The Complexity of Standing Postural Control in Older Adults: A Modified Detrended Fluctuation Analysis Based upon the Empirical Mode Decomposition Algorithm".plos one (2013).