Origin

Medial, anterior surface of the ulna

Insertion

Lateral, anterior surface of the radius

Action(s)

When pronator quadratus contracts, it pulls the lateral side of the radius towards the ulna, thus pronating the hand. Its deep fibers serve to keep the two bones in the forearm bound together. It also aids in wrist extenstion.

Nerve Supply

Median nerve (anterior interosseous nerve)

Arterial Supply

Anterior interosseous artery

Physical Exam

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Clinical Importance

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Disease States

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Discussion

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Figures

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Credits:

From Wikipedia:
Pronator quadratus

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