| Origin |
Long head: infraglenoid tubercle of scapula
Lateral head: posterior surface of humerus, superior to radial groove
Medial head: posterior surface of humerus, inferior to radial groove
|
| Insertion |
Proximal end of olecranon process of ulna and fascia of forearm
|
| Action |
Chief extensor of forearm; long head steadies head of abducted humerus
|
| Innervation |
Radial nerve (C6, C7 and C8)
|
Arterial
Supply |
Branches of deep brachial artery
|
The medical illustrations contained in this online atlas are copyrighted © 1997 by the University of Washington.
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