Abductor Pollicis BrevisThe structure indicated is the abductor pollicis brevis muscle of the hand. The abductor pollicis brevis muscle is one of the intrinsic muscles of the hand that belongs to the thenar group. The thenar group of intrinsic hand muscles consist of three muscles:
- Abductor pollicis brevis
- Flexor pollicis brevis
- Opponens pollicis
Origin: Flexor retinaculum, tubercles of scaphoid and trapzeium
Insertion: Lateral base of proximal phalanx of thumb
Innervation: Recurrent branch of median nerve: C8, T1
Action: Abducts thumbLearn all about the anatomy of the muscles of the hand in this tutorial.