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Supinator
Region: Forearm & Hand Muscles · All forearm & hand muscles
Supinator at a glance
| Origin | Lateral epicondyle of the humerus and supinator crest of the ulna |
|---|---|
| Insertion | Upper third of the radius (front, back and lateral surfaces) |
| Actions | Turns the forearm palm-up (supination) when the elbow is straight |
| Nerve supply | Posterior interosseous nerve (C6–C7) |
◆ Good to know
The posterior interosseous nerve passes through this muscle (at the arcade of Frohse), a classic compression site causing finger-drop without wrist-drop.
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.