Humeral elevation is a critical motion for individuals who use a manual wheelchair given that, in a typical day, wheelchair users reach overhead 5 times more often than able-bodied controls. Kinematic analyses in individuals with chronic spinal cord injury (SCI) have focused on weight-bearing tasks rather than overhead reaching. This technical report presents shoulder movement coordination during overhead reaching in individuals with newly acquired SCI. Eight volunteers with acute SCI and 8 matched, uninjured controls participated. Three-dimensional kinematics were collected during seated, humeral elevation. Scapular and thoracic rotations during humeral elevation were averaged across repetitions. The linear relationship of scapular upward rotation to humeral elevation provided movement coordination analysis. Maximal elevation was reduced in SCI with increased thoracic kyphosis. Medium to large effect sizes were found at each elevation angle, with reduced scapular external rotation, posterior tilt, and increased thoracic kyphosis for those with SCI. The linear relationship occurred later and within a significantly (P = .02) smaller range of humeral elevation in SCI. Altered movement coordination, including a diminished linear association of scapular upward rotation and humeral elevation (scapulohumeral rhythm), is found with reduced maximal elevation and increased thoracic kyphosis during overhead reaching tasks in those with acute SCI.

对于使用手动轮椅的人来说，肱骨抬高是一项至关重要的运动，因为在典型的一天中，轮椅使用者到达头顶的频率是身体健全的对照者的 5 倍。对慢性脊髓损伤 (SCI) 患者的运动分析主要集中于负重任务，而不是过头举重任务。该技术报告介绍了新获得 SCI 的个体在过头伸展过程中的肩部运动协调。8 名患有急性 SCI 的志愿者和 8 名匹配的未受伤对照者参加了研究。在坐姿、肱骨抬高过程中收集三维运动学数据。肱骨抬高期间的肩胛骨和胸椎旋转在重复过程中取平均值。肩胛骨向上旋转与肱骨抬高的线性关系提供了运动协调分析。SCI 中最大抬高降低，胸椎后凸增加。在每个仰角都发现了中到大的效应大小，SCI 患者的肩胛外旋减少、后倾和胸椎后凸增加。线性关系出现较晚，并且在 SCI 中肱骨抬高的显着较小范围内 ( P  = .02)。急性 SCI 患者在进行头顶伸展任务时，会出现运动协调性改变，包括肩胛骨向上旋转和肱骨抬高（肩胛肱骨节律）的线性关联减弱。