Extensor pollicis longus muscle
Updates to Article Attributes
Body
was changed:
Extensor Pollicis Longus (EPL) is a muscle on posterior compartment of the forearm. EPL defines ulnar border of anatomic snuff box.
Summary
-
origin:
posteriorposterior surface of middle 1/3 of ulna and interosseous membrane - insertion: posterior surface of the base of the distal phalanx of thumb
- innervation: Posterior interosseous nerve (C7 and C8), the continuation of the deep branch of the radial nerve (C7, C8)
- action: Extends distal phalanx of thumb at carpometacarpal and interphalangeal joints and adducts 1st metacarpal
- Injury: Tenosynovitis, common after activities such as drum playing.
-<strong>origin: p</strong>osterior surface of middle 1/3 of ulna and interosseous membrane</li>- +<strong>origin: </strong>posterior surface of middle 1/3 of ulna and interosseous membrane</li>
Sections changed:
- Anatomy
Systems changed:
- Musculoskeletal
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