FORCE TRANSMISSION THROUGH THE RADIAL HEAD
FORCE TRANSMISSION THROUGH THE RADIAL HEAD
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DOI：
10.2106/00004623-198870020-00014
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发表时间：
1988-02-01
影响因子：
5.3
通讯作者：
STORMONT, TJ
中科院分区：
文献类型：
--
作者：
MORREY, BF;AN, KN;STORMONT, TJ
一种技术已经开发出来，以研究在模拟手肘主动运动过程中，轴向力通过桡肱关节的传递。线的行动和肌肉负荷量的变化，以及在前臂的旋转在屈肘和伸肘，进行了评估。对力传递的一致模式进行了评估。在所研究的三个样本中证明了力传递的一致模式。最大的力传递发生在0 °和30 °屈曲之间，并且随着屈曲的增加而持续降低。前臂旋前时，力传递的幅度始终大于旋后时。建立手肘伸展时的内翻-外翻枢轴点，以接近肱肌的作用线，肱肌的作用线在肱骨托外侧部分的中心附近穿过。临床相关性：当考虑重建或切除这个关节时，了解桡骨头在手肘主动运动过程中力传递中的作用是很重要的。这些数据表明，在生理性肌肉挛缩过程中，桡肱关节的力传递远小于在伸展位置静态载荷的基础上报告的力传递。当前臂处于质子化状态时，桡骨头上的力增加，这对处理桡骨头骨折或脱位时前臂的定位有影响。
A technique has been developed to study the transmission of axial force across the radiohumeral joint during simulated active motion of the elbow. Variations in the line action and in the amount of muscle load, as well as in rotation of the forearm during flexion and extension of the elbow, were assessed. Consistent patterns of force transmission were assessed. Consistent patterns of force transmission were demonstrated in the three specimens that were studied. The greatest force transmission occurred between zero and 30 degrees of flexion, and it consistently decreased with increased flexion. Force transmission was consistently greater in magnitude when the forearm was in pronation than when it was in supination. The varus-valgus pivot point with the elbow extended was established to closely approximate the line of action of the brachial muscle, which crosses near the center of the lateral portion of the trochlea. Clinical Relevance: Knowledge of the role of the radial head in force transmission during active motion of the elbow is important when considering reconstruction or excision of this joint. These data reveal the force transmission of the radiohumeral joint during physiological muscle contracture to be considerably less than has been reported on the basis of static loads in the extended position. The increased force on the radial head when the forearm is in protonation has implications regarding positioning of the forearm when managing a fracture or dislocation of the radial head.