| Abductor pollicis longus muscle | |
|---|---|
 Deep muscles of posterior surface of the forearm | |
| Details | |
| Origin | Ulna, radius, Interosseous membrane |
| Insertion | Base of 1st metacarpal |
| Artery | Posterior interosseous artery |
| Nerve | Radial nerve C8, T1 |
| Actions | Abduction, extension of thumb |
| Antagonist | Adductor pollicis muscle |
| Identifiers | |
| Latin | musculus abductor pollicis longus |
| TA98 | A04.6.02.049 |
| TA2 | 2517 |
| FMA | 38515 |
| Anatomical terms of muscle | |
In human anatomy, the abductor pollicis longus (APL) is one of the extrinsic muscles of the hand. Its major function is to abduct the thumb at the wrist. Its tendon forms the anterior border of the anatomical snuffbox.