Abductor Pollicis Brevis
- Flexor retinaculum and tubercles of scaphoid and trapezium.
- Lateral side of base of proximal phalanx of thumb.
- Recurrent branch of median nerve (C8 and T1).
Arterial Supply :
- Superficial palmar branch of the radial artery.
- Abducts thumb and helps oppose it.