Abductor pollicis brevis

The abductor pollicis brevis muscle is located in the hand between the wrist and the base of the thumb. It originates from the flexor retinaculum and the tubercles of the scaphoid and trapezium bones. It inserts in the outer side of the base of the first phalanx of the thumb. This muscle is positioned just beneath the skin, slightly overlapping the flexor pollicis brevis and mostly covering the opponens pollicis. It is flat, thin, elongated, and triangular in shape. The abductor pollicis brevis is the largest muscle of the thenar eminence muscle group, which is comprised of several muscles that control the thumb. The main function of the muscle is to abduct the thumb, or move it away from the palm. This muscle is also involved in the extension and opposition of the thumb. The abductor pollicis brevis muscle is controlled by the recurrent branch of the median nerve. Its blood supply comes from the superficial palmar branch of the radial artery.
Written and medically reviewed by the Healthline Editorial Team
Co-developed by:

In Depth: Abductor pollicis brevis

Debugging Tools

Level: 3
Frame: 16
Toggle Hotspot
VP Data Tool
HexTable json from Steve
Steve's ajax layer update call:
[still on original layer]

Ad values:

adModel.dfpAdSite: hn.us.hl.bm.x.x.rfs
adParams['k1']: othermusculoskeletaldisorders,abductor_pollicis_brevis_muscle,8815957

More on BodyMaps

Take a Video Tour

Learn how to rotate, look inside and explore the human body. Take the tour

BodyMaps Feedback

How do you like BodyMaps? How can we improve it? Tell us what you think
Advertisement
Advertisement