STABILIZING FUNCTION OF THE BICEPS IN STABLE AND UNSTABLE SHOULDERS
STABILIZING FUNCTION OF THE BICEPS IN STABLE AND UNSTABLE SHOULDERS
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DOI：
10.1302/0301-620x.75b4.8331107
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发表时间：
1993-07-01
影响因子：
--
通讯作者：
AN, KN
中科院分区：
文献类型：
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作者：
ITOI, E;KUECHLE, DK;AN, KN
在13例尸体肩关节标本上，研究了肱二头肌长头和短头（LHB、SHB）对前稳定性的贡献。用弹簧装置代替LHB和SHB，并通过施加1.5 kg前向力在手臂外展90 °时进行平移测试。通过电磁跟踪装置监测肱骨头的位置，有或没有前向平移力;在60 °、90 °或120 °外旋时，在LHB或SHB肌腱上施加0 kg、1.5 kg或3 kg载荷;并且胶囊完好无损，通风，在1.5kg力作用下，LHB和SHB载荷均显著降低了肱骨头的前向位移在所有关节囊条件下，当手臂外旋60度或90度时。在120度的外旋，前移位显着减少LHB和SHB加载时，只有有Bankart laser.We得出结论，LHB和SHB有类似的功能，前稳定器的盂肱关节与手臂外展和外旋，其作用增加肩关节稳定性下降。肱二头肌的两个头已被证明具有稳定功能，在抵抗前头部位移，因此，应考虑加强肱二头肌在肩关节慢性前不稳定的康复计划。
We studied the contributions of the long and short heads of the biceps (LHB, SHB) to anterior stability in 13 cadaver shoulders. The LHB and SHB were replaced by spring devices and translation tests at 90-degrees abduction of the arm were performed by applying a 1.5 kg anterior force. The position of the humeral head was monitored by an electromagnetic tracking device with or without an anterior translational force; with 0 kg, 1.5 kg or 3 kg loads applied on either LHB or SHB tendons in 60-degrees, 90-degrees or 120-degrees of external rotation; and with the capsule intact, vented, or damaged by a Bankart lesion.The anterior displacement of the humeral head under 1.5 kg force was significantly decreased by both the LHB and SHB loading in all capsular conditions when the arm was in 60-degrees or 90-degrees of external rotation. At 120-degrees of external rotation, anterior displacement was significantly decreased by LHB and SHB loading only when there was a Bankart lesion.We conclude that LHB and SHB have similar functions as anterior stabilisers of the glenohumeral joint with the arm in abduction and external rotation, and that their role increases as shoulder stability decreases. Both heads of the biceps have been shown to have a stabilising function in resisting anterior head displacement, and consideration should therefore be given to strengthening the biceps during rehabilitation programmes for chronic anterior instability of the shoulder.