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Pronator Quadratus
Region: Forearm & Hand Muscles · All forearm & hand muscles
Pronator Quadratus at a glance
| Origin | Front surface of the lower ulna |
|---|---|
| Insertion | Front surface of the lower radius |
| Actions | Turns the forearm palm-down (the main pronator for slow, unloaded movement) |
| Nerve supply | Anterior interosseous nerve (median, C8–T1) |
◆ Good to know
This deep square sheet pulls the radius across the ulna and also holds the two forearm bones together at the wrist end.
More Forearm & Hand Muscles
Please note: This page is an anatomy education summary for students and curious readers, not medical advice. Attachment points are given in their classic short form; individual anatomy varies, and detailed dissection-level descriptions belong in an anatomy atlas.