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|Extensor pollicis brevis muscle|
Front of right upper extremity. (Extensor pollicis brevis labeled at upper left.)
Posterior surface of the forearm. Deep muscles. (Extensor pollicis brevis visible at left.)
|Origin||radius and the interosseous membrane|
|Insertion||thumb, proximal phalanx|
|Artery||posterior interosseous artery|
|Nerve||posterior interosseous nerve|
|Actions||extension of thumb at metacarpophalangeal joint|
|Antagonist||Flexor pollicis longus muscle, Flexor pollicis brevis muscle|
|Latin||musculus extensor pollicis brevis|
|Anatomical terms of muscle|
Its direction is similar to that of the abductor pollicis longus, its tendon passing the same groove on the lateral side of the lower end of the radius, to be inserted into the base of the first phalanx of the thumb.
Absence; fusion of tendon with that of the extensor pollicis longus or abductor pollicis longus muscle.
This gallery of anatomic features needs cleanup to abide by the medical manual of style.