Nonlinear analysis of sensory organization test for subjects with unilateral vestibular dysfunction

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Title:	Nonlinear analysis of sensory organization test for subjects with unilateral vestibular dysfunction
Authors:	羅孟宗;Yeh, Jia-Rong;Hsu, Li-Chi;Lin, Chen;Chang, Fu-Ling;Lo, Men-Tzung
Contributors:	生醫理工學院生醫科學與工程學系
Keywords:	Adaptive filters;Adult;Aging;Algorithms;Analysis;Biology and Life Sciences;Biomarkers;Center of pressure;Computer and Information Sciences;Consent;Data analysis;Dizziness;Empirical analysis;Engineering and Technology;Equilibrium;Female;Filter banks;Geriatrics;Hospitals;Humans;Male;Medical research;Medicine;Medicine and Health Sciences;Middle Aged;Nonlinear analysis;Older people;Parameter sensitivity;Patients;Postural Balance - physiology;Posture;Review boards;Sensory evaluation;Textile research;Time series;Trends;Vestibular Diseases - physiopathology;Vestibular Function Tests;Vestibular system;Wavelet transforms
Date:	2014-03-14
Issue Date:	2026-04-23 11:17:54 (UTC+8)
Publisher:	Public Library of Science;United States: Public Library of Science
Abstract:	摘要： Vestibular disorder is the cause of approximately 50% of dizziness in older people. The vestibular system is a critical postural control mechanism, and posturography analysis is helpful for diagnosing vestibular disorder. In clinical practice, the sensory organization test (SOT) is used to quantify postural control in an upright stance under different test conditions. However, both aging and vestibular disorder cause declines of postural control mechanisms. The aim of this study was to enhance the performance of the SOT using a nonlinear algorithm of empirical mode decomposition (EMD) and to verify the differences of effects caused by aging and/or illnesses benefits to clinical diagnosis. A total of 51 subjects belonging to 3 groups--healthy-young, healthy-elderly and dizzy--were recruited for this study. New dynamic parameters of the SOT were derived from the center of pressure (COP) signals. EMD served as an adaptive filter bank to derive the low- and high-frequency components of the COP. The effects on four ratios of sensory analysis caused by aging and vestibular disorder can be investigated for the specific frequency bands. According to our findings, new SOT parameters derived from the component with the specific frequency band more sensitively reflect the functional condition of vestibular dysfunction. Furthermore, both aging and vestibular dysfunction caused an increase in magnitude for the low-frequency component of the AP-direction COP time series. In summary, the low-frequency fluctuation reflects the stability of postural control, while the high-frequency fluctuation is sensitive to the functional condition of the sensory system. EMD successfully improved the accuracy of SOT measurements in this investigation. 其他題名： PLoS One 出版者： United States: Public Library of Science 出版日期： 2014-03-14 出處： PloS one, 2014-03, Vol.9 (3), p.e91230 資源來源： Agricultural & Environmental Science Collection 版權： COPYRIGHT 2014 Public Library of Science 版權： 2014 Yeh et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License: http://creativecommons.org/licenses/by/4.0/ (the “License”), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License. 版權： 2014 Yeh et al 2014 Yeh et al 識別號： ISSN: 1932-6203 識別號： EISSN: 1932-6203 識別號： DOI: 10.1371/journal.pone.0091230 識別號： PMID: 24632582
Appears in Collections:	[Department of Biomedical Sciences and Engineering ] journal & Dissertation

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