| Abductor pollicis brevis muscle | |
|---|---|
 Superficial muscles of the left hand, palmar view | |
| Details | |
| Origin | Transverse carpal ligament, the scaphoid and trapezium[1] |
| Insertion | Base of the proximal phalanx of thumb |
| Artery | Superficial palmar arch |
| Nerve | Recurrent branch of the median nerve |
| Actions | Abduction of the thumb by acting across the carpometacarpal joint and the metacarpophalangeal joint. It also assists in opposition and extension of the thumb. |
| Antagonist | Adductor pollicis muscle |
| Identifiers | |
| Latin | musculus abductor pollicis brevis |
| TA98 | A04.6.02.054 |
| TA2 | 2521 |
| FMA | 37373 |
| Anatomical terms of muscle | |
The abductor pollicis brevis is a muscle in the hand that functions as an abductor of the thumb.