Extensor pollicis longus muscle
Disclosures
- updated 16 Jan 2023:
- Integral Diagnostics, Shareholder (ongoing)
- Micro-X Ltd, Shareholder (ongoing)
Updates to Article Attributes
Body
was changed:
Extensor pollicis longus (EPL) muscle is a muscle of the deep compartment in the posterior compartment of the forearm. It passes through the 3rd extensor compartment of the wrist, then continues laterally towards the thumb around Lister's tubercle. The tendon of EPL defines the ulnar border of the anatomical snuffbox. It is one of the extrinsic muscles of the hand.
Summary
origin:posterior surface of the middle 1/3 of the ulna and interosseous membrane
insertion: posterior surface of the base of the distal phalanx of thumb
innervation: posterior interosseous nerve (C7 and C8), a continuation of the deep branch of the radial nerve (C7, C8)
arterial supply: anterior and posterior interosseous arteries
action: extends the thumb at the carpometacarpal and interphalangeal joints, and partially adducts 1st metacarpal
Related pathology
-<li>-<strong>origin</strong>:<strong> </strong>posterior surface of the middle 1/3 of the <a href="/articles/ulna">ulna</a> and <a href="/articles/interosseous-membrane">interosseous membrane</a>-</li>-<li>-<strong>insertion</strong>: posterior surface of the base of the distal phalanx of thumb</li>-<li>-<strong>innervation</strong>: <a href="/articles/posterior-interosseous-nerve">posterior interosseous nerve</a> (C7 and C8), a continuation of the deep branch of the <a href="/articles/radial-nerve-2">radial nerve</a> (C7, C8)</li>-<li>-<strong>arterial supply</strong>: <a href="/articles/anterior-interosseous-artery">anterior</a> and <a href="/articles/posterior-interosseous-artery">posterior interosseous arteries</a>-</li>-<li>-<strong>action</strong>: extends the thumb at the <a href="/articles/carpometacarpal-joint">carpometacarpal</a> and <a href="/articles/interphalangeal-joint-of-the-hands">interphalangeal joints</a>, and partially adducts 1st metacarpal</li>- +<li><p><strong>origin</strong>:<strong> </strong>posterior surface of the middle 1/3 of the <a href="/articles/ulna">ulna</a> and <a href="/articles/interosseous-membrane">interosseous membrane</a></p></li>
- +<li><p><strong>insertion</strong>: posterior surface of the base of the distal phalanx of thumb</p></li>
- +<li><p><strong>innervation</strong>: <a href="/articles/posterior-interosseous-nerve">posterior interosseous nerve</a> (C7 and C8), a continuation of the deep branch of the <a href="/articles/radial-nerve-2">radial nerve</a> (C7, C8)</p></li>
- +<li><p><strong>arterial supply</strong>: <a href="/articles/anterior-interosseous-artery">anterior</a> and <a href="/articles/posterior-interosseous-artery">posterior interosseous arteries</a></p></li>
- +<li><p><strong>action</strong>: extends the thumb at the <a href="/articles/carpometacarpal-joint">carpometacarpal</a> and <a href="/articles/interphalangeal-joint-of-the-hands">interphalangeal joints</a>, and partially adducts 1st metacarpal</p></li>
-<li><a href="/articles/distal-intersection-syndrome">distal intersection syndrome</a></li>-<li>-<a title="EPL tenosynovitis" href="/articles/distal-intersection-syndrome">EPL tenosynovitis</a>, common after activities such as drum playing</li>- +<li><p><a href="/articles/distal-intersection-syndrome">distal intersection syndrome</a></p></li>
- +<li><p><a href="/articles/distal-intersection-syndrome" title="EPL tenosynovitis">EPL tenosynovitis</a>: common after activities such as drum playing</p></li>
- +<li><p><a href="/articles/tendon-rupture" title="tendon rupture">tendon rupture</a> after <a href="/articles/distal-radius-fracture" title="distal radius fracture">distal radius fracture</a> and/or ORIF <sup>3,4</sup></p></li>
References changed:
- 1. Last, R. J., McMinn, R. M. H.. Last's Anatomy, Regional and Applied. (1994) ISBN: 044304662X - <a href="http://books.google.com/books?vid=ISBN044304662X">Google Books</a>
- 2. Susan Standring. Gray's Anatomy. (2008) ISBN: 9780443066849 - <a href="http://books.google.com/books?vid=ISBN9780443066849">Google Books</a>
- 3. Roth K, Blazar P, Earp B, Han R, Leung A. Incidence of Extensor Pollicis Longus Tendon Rupture After Nondisplaced Distal Radius Fractures. J Hand Surg Am. 2012;37(5):942-7. <a href="https://doi.org/10.1016/j.jhsa.2012.02.006">doi:10.1016/j.jhsa.2012.02.006</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/22463927">Pubmed</a>
- 4. Hara A, Yamamoto Y, Ichihara S, Suzuki M, Maruyama Y. Simple Surgical Technique for Minimizing the Risk of Extensor Pollicis Longus Rupture Following Volar Plate Fixation of Distal Radial Fracture: A Case Report. Int J Surg Case Rep. 2022;92:106869. <a href="https://doi.org/10.1016/j.ijscr.2022.106869">doi:10.1016/j.ijscr.2022.106869</a> - <a href="https://www.ncbi.nlm.nih.gov/pubmed/35231738">Pubmed</a>
- 1. Last's anatomy, regional and applied. Churchill Livingstone. ISBN:044304662X. <a href="http://books.google.com/books?vid=ISBN044304662X">Read it at Google Books</a> - <a href="http://www.amazon.com/gp/product/044304662X">Find it at Amazon</a><span class="auto"></span>
- 2. Standring, Susan, and Henry Gray. 2008. Gray's anatomy: the anatomical basis of clinical practice. [Edinburgh]: Churchill Livingstone/Elsevier. http://www.clinicalkey.com/dura/browse/bookChapter/3-s2.0-B9780443066849X5001X
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