Muscle Atlas

Abductor Pollicis Brevis

Origin: Flexor retinaculum and tubercles of scaphoid and trapezium
Insertion: Lateral side of base of proximal phalanx of thumb
Action: Abducts thumb and helps oppose it
Innervation: Recurrent branch of median nerve (C8 and T1)
Arterial Supply: Superficial palmar branch of the radial artery

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