Anconeus

• 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

References

• The aconeus muscle flap: its anatomy and clinical application.