Xue Q, Huang G
Department of Orthopaedic Surgery, Beijing Hospital, China.
Chin Med J (Engl). 1998 May;111(5):447-9.
To investigate the muscle-controlled dynamic stability of the glenohumeral joint through X-ray fluoroscopy in active and passive shoulder elevation in scapular plane.
Sixty healthy volunteers were collected in this study, including 23 men and 37 women, with an average age of 28.4 years. Passive and active shoulder elevation in scapular plane were observed under X-ray imaging. In 18 subjects, X-ray films were taken when the shoulder elevated in scapular plane from 0 degree to 150 degrees with a 30 degrees interval at each stage in both active and passive movements. The angles between the pivot of the humerus and the glenoid surface (GHA) during the active and passive motion were calculated and analyzed. Manual examination was also applied in the same manner.
The pivot of the humerus had a tendency to be vertically closer to the glenoid surface in the active elevation than in the passive elevation. The differences of GHA between the active and passive motion at 0 degree, 30 degrees, 60 degrees, 90 degrees, 120 degrees and 150 degrees elevation were 4.55 degrees +/- 0.37 degree, 5.44 degrees +/- 1.16 degrees, 6.50 degrees +/- 1.50 degrees, 4.94 degrees +/- 0.82 degree, 4.50 degrees +/- 0.40 degree and 1.44 degrees +/- 0.68 degree, respectively. Manual examination found the angle between the scapula and the humerus tended to be larger in the active motion than in the passive motion.
The active coordination of the muscles around the shoulder is beneficial to the dynamic stability of the glenohumeral joint.
通过X线透视研究在肩胛平面主动和被动肩关节抬高时盂肱关节的肌肉控制动态稳定性。
本研究纳入60名健康志愿者，其中男性23名，女性37名，平均年龄28.4岁。在X线成像下观察肩胛平面的被动和主动肩关节抬高情况。在18名受试者中，当肩关节在肩胛平面从0度抬高到150度时，在主动和被动运动的每个阶段每隔30度拍摄X线片。计算并分析主动和被动运动过程中肱骨头与关节盂表面（GHA）之间的角度。同时以相同方式进行手法检查。
在主动抬高时，肱骨头有比被动抬高时更垂直靠近关节盂表面的趋势。在0度、30度、60度、90度、120度和150度抬高时，主动和被动运动之间GHA的差异分别为4.55度±0.37度、5.44度±1.16度、6.50度±1.50度、4.94度±0.82度、4.50度±0.40度和1.44度±0.68度。手法检查发现，主动运动时肩胛骨与肱骨之间的角度往往比被动运动时更大。
肩部周围肌肉的主动协调有利于盂肱关节的动态稳定性。
