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The purposes of this study are: (1) to investigate whether there will be muscle stiffness and muscular activity difference between subjects with stiff shoulders and controls; and (2) to determine the correlations between posterior shoulder muscle stiffness, muscular activities, and rotation range of motion. The investigators hypothesize that there are muscle stiffness and muscular activity difference between subjects with stiff shoulders and controls. The investigators also hypothesize that posterior shoulder muscle stiffness, muscular activities, and rotation range of motion are significantly correlated.
Objective: The purpose of this study is to investigate whether there will be muscle stiffness and muscular activity difference between subjects with stiff shoulders and controls and to determine the correlations between posterior shoulder muscle stiffness, muscular activities, and rotation range of motion.
Design: Prospective, cross-sectional study.
Subjects: Thirty subjects with stiff shoulder (SS) and 15 healthy subjects will be recruited.
Methods: Range of motion of rotation, electromyography activity, and stiffness in 4 muscles (posterior deltoid, infraspinatus, teres minor and teres major) of the affected shoulder and control shoulders will be measured using a goniometer, electromyography, and a myotonometer, respectively.
Data analysis: Data will be analyzed using SPSS 12 software (SPSS Inc., Chicago, IL). Independent t tests will be used to compare the posterior muscle stiffness and muscular activity between subjects with SS and controls. Pearson correlation coefficients will be calculated to identify which muscle stiffness and muscular activity that are significantly correlated to rotation. For explanatory rotation, stepwise regression models will be calculated using significant muscle stiffness and muscular activity as predicators.
Observational Model: Case Control, Time Perspective: Cross-Sectional
National Taiwan University Hospital
Not yet recruiting
National Taiwan University Hospital
Published on BioPortfolio: 2014-08-27T03:17:38-0400
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Replacement for a SHOULDER JOINT.
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Unilateral or bilateral pain of the shoulder. It is often caused by physical activities such as work or sports participation, but may also be pathologic in origin.
Replacement of the SHOULDER JOINT.
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