| Origin |
Lateral epicondyle of humerus
|
| Insertion |
Lateral surface of olecranon and superior part of posterior surface of ulna
|
| Action |
Assists triceps in extending forearm; stabilizes elbow joint; abducts ulna during pronation
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| Innervation |
Radial nerve (C7, C8 and T1)
|
Arterial
Supply |
Middle collateral branch of deep brachial artery
Recurrent interosseous artery
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