Pronator quadratus muscle

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The pronator quadratus muscle is a muscle in the forearm near the wrist that serves to pronate the hand. It also helps to keep the distal radius and ulna together.

Contents

Origin

The pronator quadratus originates from the ulna, on the lower quarter of anterior medial shaft.

Insertion

The pronator quadratus inserts on the radius, at the lower quarter of anterior lateral shaft. Some fibers also attach at interosseous membrane between the radius and ulna.

Innervation

The pronator quadratus is innervated by the anterior interosseous nerve (C8).

See also

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