生体内動態解析による肩関節外転運動時の肩甲骨上方回旋角度の男女間比較検討

概要

論文の詳細を見る
Background: The scapulohumeral rhythm is considered important to understand the function of shoulder, and is indicative of correct neuromuscular stabilization of the scapula as the basis for dynamic upper extremity activity. The goal of this study was to determine, in vivo, the influence of loading weights on scapular upward rotation on males and females. Methods: Ten healthy shoulders in ten subjects (5 men, 5 women) were studied. 3D models of the shoulder were created from CT images. The subject was positioned in front of a fluoroscope and motions were recorded during active scaption from 0°-120° with a 3kg weight loaded and unloaded. 3D motions of the scapula and humerus were determined using model-based 3D-to-2D registration. The measured 3D kinematics of the humerus and scapula were analyzed to determine scapular upward rotation and arm abduction relative to the ground to compare the incremental data between loaded and unloaded trials. Results: Scapular upward rotation was significantly less during the loaded trial in males. There were no statistically significant differences in scapular upward rotation between the loaded and unloaded trials in females of arm abduction. Discussion: This study showed that, in males, scapular upward rotation decreased over the range of abduction angles while loaded, suggesting that the scapula is relatively fixed to the torso, providing a stable fulcrum for the rotator cuff. Conversely, women show some trends towards greater scapular upward rotation with a weight than without, suggesting scapular rotation may compensate for weakness of the muscles.

生体内動態解析による肩関節外転運動時の肩甲骨上方回旋角度の男女間比較検討

スポンサーリンク

概要

著者

関連論文

スポンサーリンク