Campbell Amity Cree, Alderson J A, Lloyd D G, Elliott B C
School of Sport Science, Exercise and Health, The University of Western Australia, M408, 35 Stirling Hwy, Crawley, WA 6009, Australia.
Med Biol Eng Comput. 2009 May;47(5):543-50. doi: 10.1007/s11517-009-0467-7. Epub 2009 Mar 13.
This study aimed to find the most appropriate marker location, or combination thereof, for the centre of the humeral head (Wang et al. in J Biomech 31: 899-908, 1998) location representation during humeral motion. Ten male participants underwent three MRI scans in three different humeral postures. Seven technical coordinate systems (TCS) were defined from various combinations of an acromion, distal upper arm and proximal upper arm clusters of markers in a custom Matlab program. The CHH location was transformed between postures and then compared with the original MRI CHH location. The results demonstrated that following the performance of two near 180 degrees humeral elevations, a combined acromion TCS and proximal upper arm TCS produced an average error of 23 +/- 9 mm, and 18 +/- 4 mm, which was significantly smaller (p < 0.01) than any other TCS. A combination of acromion and proximal upper arm TCSs should therefore be used to reference the CHH location when analysing movements incorporating large ranges of shoulder motion.
本研究旨在寻找在肱骨运动过程中用于表示肱骨头中心位置（Wang等人，《生物力学杂志》，31卷：899 - 908页，1998年）的最合适的标记位置或其组合。十名男性参与者在三种不同的肱骨姿势下接受了三次MRI扫描。在一个定制的Matlab程序中，从肩峰、上臂远端和上臂近端标记簇的各种组合中定义了七个技术坐标系（TCS）。肱骨头中心（CHH）位置在不同姿势之间进行转换，然后与原始MRI的CHH位置进行比较。结果表明，在进行两次接近180度的肱骨抬高动作后，肩峰TCS和上臂近端TCS的组合产生的平均误差分别为23±9毫米和18±4毫米，这明显小于（p < 0.01）任何其他TCS。因此，在分析包含大范围肩部运动的动作时，应使用肩峰和上臂近端TCS的组合来参考CHH位置。
