Robert-Lachaine Xavier, Marion Patrick, Godbout Véronique, Bleau Jacinte, Begon Mickael
a Laboratoire d'Ingénierie du Mouvement, Département de Kinésiologie , Université de Montréal , Campus Laval, 1700 rue Jacques-Tétreault, Laval , QC , Canada H7N 0B6.
Comput Methods Biomech Biomed Engin. 2015;18(3):249-58. doi: 10.1080/10255842.2013.792810. Epub 2013 May 8.
The scapulo-humeral rhythm quantifies shoulder joint coordination during arm elevation. The common method calculates a ratio of gleno-humeral (GH) elevation to scapulo-thoracic upward rotation angles. However the other rotations also contribute to arm elevation. The objective is to propose a 3D dynamic scapulo-humeral rhythm calculation method including all rotations of the shoulder joints and compare with the common method. Twenty-nine skin markers were placed on the trunk and dominant arm of 14 healthy males to measure shoulder kinematics. Two-way repeated measures ANOVAs were applied to compare the two methods of calculation of joint contributions and scapulo-humeral rhythm during arm elevation. Significant main effects (p < 0.05) were observed between methods in joint contribution angles and scapulo-humeral rhythms. A systematic overestimation of the GH contribution was observed when only using the GH elevation angle because the scapula is moved outside a vertical plane. Hence, the proposed 3D method to calculate the scapulo-humeral rhythm allows an improved functional shoulder evaluation.
肩肱节律量化了手臂抬高过程中肩关节的协调性。常用方法计算盂肱（GH）抬高与肩胛胸壁向上旋转角度的比值。然而，其他旋转也对手臂抬高有贡献。目的是提出一种包括肩关节所有旋转的三维动态肩肱节律计算方法，并与常用方法进行比较。在14名健康男性的躯干和优势手臂上放置了29个皮肤标记，以测量肩部运动学。应用双向重复测量方差分析来比较手臂抬高过程中关节贡献和肩肱节律的两种计算方法。在关节贡献角度和肩肱节律方面，两种方法之间观察到显著的主效应（p < 0.05）。当仅使用GH抬高角度时，观察到对GH贡献的系统性高估，因为肩胛骨在垂直平面之外移动。因此，所提出的用于计算肩肱节律的三维方法允许改进功能性肩部评估。
