Pronator teres muscle

The pronator teres muscle is a muscle in the forearm that pronates the forearm and flexes the elbow.

Origin
The pronator teres originates from several points on the humerus at the elbow joint, and on the ulna. On the humerus, it attaches to the medial epicondyle, the medial supracondylar ridge, and the medial intermuscular septum. On the ulna, it attaches to the medial border of the ulnar coronoid process.

Insertion
The pronator teres inserts on the radius, just posterior to the most prominent part of the lateral convexity.

Innervation
The pronator teres is innervated by the median nerve (C6 and C7).