In vitro estimation of glenohumeral joint center of rotation

Jia Hao Chang*, Ar Tyan Hsu, Guan Liang Chang


研究成果: 雜誌貢獻期刊論文同行評審

2 引文 斯高帕斯(Scopus)


The purposes of this study were to calculate and verify the center of rotation (COR) using least squares method and to determine the displacement of the humeral head during passive abduction movements of the glenohumeral joint. A hinge and pivot joint model with a reflective marker triad rigidly attached was used to verify the accuracy of the COR estimation. Eleven fresh cadaver shoulder specimens with reflective markers attached to the humerus were used to find the COR of the glenohumeral joint. A 6-camera motion analysis system (Vicon 370) was used to monitor the trajectories of these reflective markers. In the hinge joint model, the errors between the estimated COR and the real COR were 0.25, 0.13 and 0.88 mm in the x-, y- and z-directions, respectively. In the cadaver model, the means of standard deviation of the estimated COR in the x-, y- and z-directions were 1.16, 0.72 and 1.12 mm, respectively. Since reflective markers were attached rigidly on the humerus, the error caused by the skin movements could be ignored. The results showed that the least squares method is suitable for determining the COR of the glenohumeral joint in vitro.

頁(從 - 到)191-195
期刊Journal of Medical and Biological Engineering
出版狀態已發佈 - 2008 12月

ASJC Scopus subject areas

  • 生物醫學工程


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