Opponens pollicis muscle
| Opponens pollicis muscle | |
|---|---|
The deep muscles of the right hand. Palmar surface. | |
The superficial muscles of the left hand. Palmar surface. | |
| Details | |
| Origin | Trapezium and transverse carpal ligament |
| Insertion | Metacarpal bone of the thumb on its radial side |
| Artery | Superficial palmar arch |
| Nerve | Recurrent branch of the median nerve |
| Actions | Flexion of the thumb's metacarpal at the first carpometacarpal joint, which aids in opposition of the thumb |
| Identifiers | |
| Latin | musculus opponens pollicis |
| TA98 | A04.6.02.058 |
| TA2 | 2525 |
| FMA | 37379 |
| Anatomical terms of muscle | |
The opponens pollicis is a small, triangular muscle in the hand, which functions to oppose the thumb. It is one of the three thenar muscles. It lies deep to the abductor pollicis brevis and lateral to the flexor pollicis brevis.