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Abductor Pollicis Longus
Region: Forearm & Hand Muscles · All forearm & hand muscles
Abductor Pollicis Longus at a glance
| Origin | Back surfaces of the ulna and radius and the interosseous membrane |
|---|---|
| Insertion | Base of the first metacarpal (thumb) |
| Actions | Moves the thumb away from the palm in its plane (abduction at the wrist joint of the thumb); Helps straighten the wrist toward the thumb side |
| Nerve supply | Posterior interosseous nerve (C7–C8) |
◆ Good to know
One of the three 'outcropping' thumb muscles forming the front border of the anatomical snuffbox.
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.