![](http://new.wheelessonline.com/media/2020/07/armm1a.jpg)
![](http://new.wheelessonline.com/media/2020/07/armm6a.jpg)
origin: posterior surface of lateral epicondyle of humerus;
insertion: lateral side of olecranon process and posterior surface of proximal portion of ulna;
action: extension and pronation of the forearm at the elbow;
nerve supply: radial, C5, C6;
synergist: triceps brachii
The aconeus muscle flap: its anatomy and clinical application.