Abstract
[Purpose] The aim of this study was to develop a clinical upper extremity model to analyze joint motion in comparison with joint angles measured by a universal goniometer. [Subjects] Active movements of the right upper extremities of ten healthy volunteers were measured with both a universal goniometer and a Vicon 512 motion analyzer, and joint angles were calculated using Euler angles. [Methods] The range of error was established between joint angles measured by the universal goniometer and the Vicon 512. Validity and reliability for our clinical model were established using Pearson’s correlation and intraclass correlation coefficients (ICCs), respectively. [Results] The mean error of 34 joint angles was less than 10°. The error was > 10° for 135° and maximum shoulder abduction. Pearson’s correlation was > 0.9 between the goniometer and the Vicon 512. For the universal goniometer, intra-rater ICC reliability ranged from 0.71 to 0.96, and inter-rater ICC reliability ranged from 0.61 to 0.95. [Conclusions] We found that our clinical model was both valid and reliable for all upper extremity joints. This model can serve as a comprehensive tool for clinical upper extremity motion analysis.
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