Document Detail

Wavelet analysis based on time-frequency information discriminate chronic ankle instability.
MedLine Citation:
PMID:  20005614     Owner:  NLM     Status:  MEDLINE    
BACKGROUND: Ankle sprains are one of the most common lower extremity injuries. Real time human motion tracking is an accurate, inexpensive and portable system to obtain kinematic and kinetic measurements. The purpose of this study was to discriminate between subjects with chronic ankle instability and subjects with stable ankles through inertial tracking technology and force plates. METHODS: Twelve subjects (mean (SD) 23.16 (5.32) years, 174.83 (8.78) cm, 73.58 (17.10) kg) with stable ankles and 13 (mean (SD) 24.69 (5.91) years, 173.31 (9.07) cm, 69.61 (15.32) kg) with chronic ankle instability performed the Star Excursion Balance Test. Time-frequency information based on wavelet decomposition was used for analysing all signals. FINDINGS: Dynamic balance impairment associated with chronic ankle instability was observed in the peak amplitude in the wavelet approximation as well as the absolute sum of the coefficients of the wavelet details of the acceleration, orientation and force signals. These results were found despite Star Excursion Balance Test performance during anterior, posteromedial and posterolateral excursions lead to similar specific reach distances in both limbs in either the chronic ankle instability or stable ankle groups. INTERPRETATION: These parameters could be of great interest in detecting dynamic balance impairment in individuals at risk of sprains that might otherwise go undetected by only reach distance assessment.
A Mart?nez-Ram?rez; P Lecumberri; M G?mez; M Izquierdo
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2009-12-14
Journal Detail:
Title:  Clinical biomechanics (Bristol, Avon)     Volume:  25     ISSN:  1879-1271     ISO Abbreviation:  Clin Biomech (Bristol, Avon)     Publication Date:  2010 Mar 
Date Detail:
Created Date:  2010-02-17     Completed Date:  2010-05-24     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  8611877     Medline TA:  Clin Biomech (Bristol, Avon)     Country:  England    
Other Details:
Languages:  eng     Pagination:  256-64     Citation Subset:  IM    
Mathematics Department, Public University of Navarra, Pamplona, Navarre, Spain.
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MeSH Terms
Ankle Joint / physiopathology*
Diagnosis, Computer-Assisted / methods*
Joint Instability / diagnosis*,  physiopathology*
Reproducibility of Results
Sensitivity and Specificity
Young Adult

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