Summary of pronator teres

Summary of pronator teres 

Origin

It arises by two heads

Superficial head from the medial epicondyle of the humerus and deep head from medial margin of the coronoid process of ulna

Insertion

A rough impression on the middle one-third of the lateral surface of the radius

Nerve supply

Median nerve

Action

 pronator of the forearm

It also weakly  flexed the  elbow

Shape of muscle

Circular or round

Important relation

It forms the medial boundary of the cubital fossa

Median nerve

The median nerve enters the forearm between the two heads of the muscle, and is separated from the ulnar artery by the ulnar head.

Direction of muscle

Muscle situated obliquely in the upper half of  forearm

Variation

Occasionally, the ulnar head is absent. Also, additional slips from the medial intermuscular septum, from the biceps brachii, and from the brachialis occasionally occur.