Abductor Pollicis Brevis (APB) Anatomy
APB Muscle Data
- Origin: Scaphoid and trapezium bones and the flexor retinaculum
- Insertion: Lateral base of the proximal phalanx and the extensor hood of the thumb
- Innervation: Median nerve
- Nerve: Recurrent branch of the median nerve
Diagrams & Photos
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Abductor Pollicis Brevis (APB)
Key Points
- Abductor Pollicis Brevis (APB) muscle is innervated by the median nerve.
- Abductor Pollicis Brevis (APB) muscle is superficial to the opponens pollicis and the flexor pollicis brevis superficial head.