Cain P R, Mutschler T A, Fu F H, Lee S K
Am J Sports Med. 1987 Mar-Apr;15(2):144-8. doi: 10.1177/036354658701500209.
This study defines the interaction of the rotator cuff musculature and the glenohumeral ligaments in providing anterior stability to the glenohumeral joint. Eight cadaveric shoulders were studied using a testing frame that individually simulated the forces of the subscapularis, the supraspinatus, and the infraspinatus/teres minor musculature. The application of these forces abducted the humerus to approximately 90 degrees. The cocking phase of throwing was then simulated through the use of an Instron. With random variation of the rotator cuff forces, we investigated the effects that each force had on the rotation of the humerus and the strain of the inferior glenohumeral ligament. Our results demonstrate that the infraspinatus/teres minor muscle group was the most effective in controlling external rotation of the humerus and in reducing ligamentous strain. These observations are pertinent in the treatment of anterior instability syndromes of the shoulder.
本研究确定了肩袖肌群与盂肱韧带在为盂肱关节提供前向稳定性方面的相互作用。使用一个测试框架对八个尸体肩部进行研究，该框架分别模拟肩胛下肌、冈上肌以及冈下肌/小圆肌的力量。施加这些力量可使肱骨外展至约90度。然后通过使用英斯特朗万能材料试验机模拟投掷的引臂阶段。随着肩袖力量的随机变化，我们研究了每种力量对肱骨旋转和下盂肱韧带应变的影响。我们的结果表明，冈下肌/小圆肌组在控制肱骨外旋和减少韧带应变方面最为有效。这些观察结果与肩部前不稳定综合征的治疗相关。
