extensor pollicis brevis muscle


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ex·ten·sor pol·li·cis brev·is mus·cle

(eks-ten'sŏr pol'i-sis brē'vis mŭs'ĕl)
Muscle of posterior (extensor) compartment of forearm; origin, dorsal surface of distal radius and adjacent interosseous membrane; insertion, posterior aspect of base of proximal phalanx of thumb; action, extends and abducts the thumb at metacarpophalangeal joint; nerve supply, radial joint (posterior interosseous).
Synonym(s): musculus extensor brevis pollicis, musculus extensor pollicis brevis, short extensor muscle of thumb.
References in periodicals archive ?
These branches originated always distally to the tendon of extensor pollicis brevis muscle. Samarakoon et al.
1), is laterally limited by the tendons of abductor pollicis longus and extensor pollicis brevis muscles, and medially limited by the tendon of extensor pollicis longus muscle (Latarjet & Ruiz-Liard).
Deep dissection was performed between the synovial sheaths of the extensor carpi radialis muscle and the combined synovial sheaths of the abductor pollicis longus and extensor pollicis brevis muscles to reach 3-4 mm proximal to the radioscaphoid joint.

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