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The unstable shoulder in arm elevation : A three-dimensional and electromyographic study in subjects with glenohumeral instability
MATIAS R; PASCOAL AG
CLIN BIOMECH , 2006, vol. 21, n° SUPPL.1, p. S52-S58 Doc n°: 123950 Localisation : Documentation IRR Descripteurs : DD32 - EXPLORATION EXAMENS BILANS - EPAULE Although ail altered scapulohumeral rhythm is believed to be related to some shoulder dysfunctions, there is scarce evidence oil the scapulohumeral rhythm and shoulder muscle activation patterns in subjects with glenohumeral instability. Methods. Six subjects with glenohumeral instability performed arm elevation in trials of 8 successive stationary positions. Kinematics were recorded oil each stationary position using a 6 DOF electromagnetic tracking device. Scapular kinematics was analysed by comparison between recorded scapular angles and those estimated by a linear regression model of the scapulohumeral rhythm which served as standard for normality. Surface electromyographic activity was recorded from the upper and lower trapezius, serratus anterior and deltoid. Findings. Differences in the scapulohumeral rhythm were observed between subjects. Significant differences were founded in scapular protraction and spinal tilt. No differences were found in scapular lateral-rotation in all subjects. Langue : ANGLAIS |
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