Accuracy and reliability of three methods of recording scapular motion using reflective skin markers

摘要

Measurement of scapular kinematics has proved to be difficult because movement of the scapula occurs beneath the skin and muscles [1]. Compared to electromagnetic tracking systems which have been extensively studied [2, 3] and used in clinical practice [4-6], few studies have evaluated scapular movement using reflective markers with an optoelectronic measurement system [7-9]. However, the development and evaluation of methods which can track complete shoulder motion (i.e. thoraco-scapulo-humeral joint) using an optoelectronic system is of interest for the following reasons.