【肌动学】-肘关节的学习笔记

Joint Structures and Motions

肘关节和前臂复合体包括三块骨（humerus、radius、ulna）、三条韧带（内侧副韧带、外侧副韧带、环韧带）、四个关节(肱尺、肱桡、近端桡尺、远端桡尺关节)和一个关节囊。

肱尺关节和肱桡关节为改良铰链关节，因为尺骨在肘屈伸的时候可以进行一个小范围的轴向旋转和侧向的运动。

在肱尺关节处于屈曲状态时，滑车切迹的凹面在滑车的凸面发生滚动和滑动。

肱桡关节屈伸的运动学为由桡骨窝在肱骨小头凸面上的滚动和滑动。

肘关节充分伸展需要皮肤、屈肌、前关节囊和内侧副韧带的前纤维束需要具有足够的伸展性。

提携角

前臂

旋后

旋前

Summary of Muscle Innervations

Stability of the Elbow Complex

The joint stability includes three dimensions which are listed as follows：

• configuration of the bone or mass of the muscles

• constraint of the connective tissues

• contraction of the muscles

• Common Injuries at the Elbow

  
  

  
  

• Direct stress

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• longitudinal compression stress à fracture of radial head, coronoid or olecranon process and supracondylar fracture

• distraction stress à nurse maid's elbow (pulled elbow, dislocation of radial head)

• posterior stress à posterior dislocation of the elbow

  
  

Repeated stresses

• repeated wrist motions as forearm pronated à repeated tensile stress on extensor carpi radilais brevis à tennis elbow (lateral epicondylitis)

• repeated wrist motions as forearm supinated à repeated tensile stress on pronator teres, flexor carpi radialis à golfer's elbow

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(本文系小编整理首发，转载请注明出处。参考资料：肌肉骨骼系統肌動學復健醫學基礎 ，Kinesiology,NTUPT)