Extensor Pollicis Longus: Difference between revisions
No edit summary |
Aya Alhindi (talk | contribs) (general review and corrected references) |
||
| Line 15: | Line 15: | ||
=== Nerve === | === Nerve === | ||
The extensor pollicis longus innervated by a motor branch of the posterior interosseous nerve, which belongs to the deep group of branches from the posterior interosseous nerve. <ref name=":2">Khan IA, Varacallo M. Anatomy, Shoulder and Upper Limb, Hand Extensor Pollicis Longus Muscle. StatPearls Publishing; 2022.</ref> | |||
=== Artery === | === Artery === | ||
EPL blood supply is via the posterior interosseous artery and perforating branches of the anterior interosseous artery.<ref name=":0" /><ref name=":1" /> | EPL blood supply is via the posterior interosseous artery and perforating branches of the anterior interosseous artery.<ref name=":0" /><ref name=":1">Khan I. Anatomy, Shoulder and Upper Limb, Hand Extensor Pollicis Longus Muscle. In: Varacallo M. editor. Statpearls, 2020. Available from:https://www.statpearls.com/articlelibrary/viewarticle/36135/ (accessed 10 October 2020)</ref> | ||
== Function == | == Function == | ||
* The EPL mainly hyper-/extends the interphalangeal joint of the distal phalanx of the thumb.<ref>Wikipedia. | * The EPL mainly hyper-/extends the interphalangeal joint of the distal phalanx of the thumb.<ref>Wikipedia contributors. [https://en.wikipedia.org/w/index.php?title=Extensor_pollicis_longus_muscle&oldid=1135385243 Extensor pollicis longus muscle] [Internet]. Wikipedia, The Free Encyclopedia. 2023. </ref> | ||
* It also serves as accessory extensors and adductors of the metacarpophalangeal of the proximal phalanx and carpometacarpal joints of the first metacarpal.<ref name=": | * It also serves as accessory extensors and adductors of the metacarpophalangeal of the proximal phalanx and carpometacarpal joints of the first metacarpal.<ref name=":2" /> | ||
* It may also assist in [[Wrist and Hand|wrist joint]] extension.<ref name=":0"> | * It may also assist in [[Wrist and Hand|wrist joint]] extension.<ref name=":0">[https://www.kenhub.com/en/library/anatomy/extensor-pollicis-longus-muscle Extensor pollicis longus muscle] [Internet]. Kenhub. . </ref> | ||
{{#ev:youtube|Wx2kew_ut_Y|300}}<ref>Nabil Ebraheim. Extensor Muscles of The Thumb - Everything You Need To Know - Dr. Nabil Ebraheim. Available from: http://www.youtube.com/watch?v=Wx2kew_ut_Y [last accessed 10/10/2020]</ref> | {{#ev:youtube|Wx2kew_ut_Y|300}}<ref>Nabil Ebraheim. Extensor Muscles of The Thumb - Everything You Need To Know - Dr. Nabil Ebraheim. Available from: http://www.youtube.com/watch?v=Wx2kew_ut_Y [last accessed 10/10/2020]</ref> | ||
== Clinical relevance == | == Clinical relevance == | ||
Latest revision as of 00:44, 3 February 2024
Original Editor - Uchechukwu Chukwuemeka
Top Contributors - Uchechukwu Chukwuemeka, Kim Jackson, Shaimaa Eldib and Aya Alhindi
Description[edit | edit source]
Extensor pollicis longus (EPL) is a long muscle located at the deep layer with extensor pollicis brevis, abductor pollicis longus, extensor indicis, and supinator muscle in the posterior compartment of the forearm.[1] It originates from the mid-third of the ulna, and interosseous membrane then courses down to the distal phalanx of the thumb. Though it is situated at the forearm, it is classified as part of the extrinsic muscles of the hand as it's function is seen in thumb movement.[2]
Origin[edit | edit source]
It originates from the mid-third of the ulna, and interosseous membrane
Insertion[edit | edit source]
It inserts at the base of distal phalanx of thumb via Lister's tubercle; that is the dorsal tubercle of the radius.
Nerve[edit | edit source]
The extensor pollicis longus innervated by a motor branch of the posterior interosseous nerve, which belongs to the deep group of branches from the posterior interosseous nerve. [3]
Artery[edit | edit source]
EPL blood supply is via the posterior interosseous artery and perforating branches of the anterior interosseous artery.[4][5]
Function[edit | edit source]
- The EPL mainly hyper-/extends the interphalangeal joint of the distal phalanx of the thumb.[6]
- It also serves as accessory extensors and adductors of the metacarpophalangeal of the proximal phalanx and carpometacarpal joints of the first metacarpal.[3]
- It may also assist in wrist joint extension.[4]
Clinical relevance[edit | edit source]
Tenosynovitis is a relatively common inflammatory irritation of the synovial sheath, after repetitive activities such as playing drum; this is termed drummers palsy.[4]
Assessment[edit | edit source]
References[edit | edit source]
- ↑ Moore KL, Dalley AF, Agur AM. Clinically oriented anatomy. 7th ed. Baltimore, MD: Lippincott Williams & Wilkins, 2014.
- ↑ Drake RL, Vogl W, Mitchell AW, Gray H. Gray's anatomy for Students 2nd edition. Philadelphia : Churchill Livingstone/Elsevier, 2010.
- ↑ 3.0 3.1 Khan IA, Varacallo M. Anatomy, Shoulder and Upper Limb, Hand Extensor Pollicis Longus Muscle. StatPearls Publishing; 2022.
- ↑ 4.0 4.1 4.2 Extensor pollicis longus muscle [Internet]. Kenhub. .
- ↑ Khan I. Anatomy, Shoulder and Upper Limb, Hand Extensor Pollicis Longus Muscle. In: Varacallo M. editor. Statpearls, 2020. Available from:https://www.statpearls.com/articlelibrary/viewarticle/36135/ (accessed 10 October 2020)
- ↑ Wikipedia contributors. Extensor pollicis longus muscle [Internet]. Wikipedia, The Free Encyclopedia. 2023.
- ↑ Nabil Ebraheim. Extensor Muscles of The Thumb - Everything You Need To Know - Dr. Nabil Ebraheim. Available from: http://www.youtube.com/watch?v=Wx2kew_ut_Y [last accessed 10/10/2020]
- ↑ Nabil Ebraheim. Rupture of the Extensor Pollicis Longus Tendon - Everything You Need To Know - Dr. Nabil Ebraheim. Available from: http://www.youtube.com/watch?v=QvDRgMR5_6E [last accessed 10/10/2020]
- ↑ Nabil Ebraheim. Common Conditions Of The Thumb - Everything You Need To Know - Dr. Nabil Ebraheim. Available from: http://www.youtube.com/watch?v=YfBw3Xcdg0s [last accessed 10/10/2020]
- ↑ ACM OTA Class of 2016. MMT Extensor pollicis longus & brevis. Available from: http://www.youtube.com/watch?v=ayMUlbSz7Cw [last accessed 10/10/2020]
