Extensor pollicis longus muscle

Extensor pollicis longus muscle
Posterior surface of the forearm. Deep muscles. Extensor pollicis longus muscle is labeled in purple.
Details
OriginMiddle third of posterior surface of ulna, interosseous membrane
InsertionThumb, distal phalanx
ArteryPosterior interosseous artery
NervePosterior interosseous nerve (branching from the radial nerve)
ActionsExtension of the thumb (metacarpophalangeal and interphalangeal)
AntagonistFlexor pollicis longus muscle, flexor pollicis brevis muscle
Identifiers
Latinmusculus extensor pollicis longus
TA98A04.6.02.051
TA22516
FMA38521
Anatomical terms of muscle

In human anatomy, the extensor pollicis longus muscle (EPL) is a skeletal muscle located dorsally on the forearm. It is much larger than the extensor pollicis brevis, the origin of which it partly covers and acts to stretch the thumb together with this muscle.