The lumbricals arise from the tendons of the flexor digitorum longus muscle,[1] as far back as their angles of division, each springing from two tendons, except the first. The first lumbrical is unipennate, while the second, third and fourth are bipennate.
The muscles end in tendons, which pass forward on the medial sides of the four lesser toes, and are inserted into the expansions of the tendons of the extensor digitorum longus muscle on the dorsal surfaces of the proximal phalanges.[1] All four lumbricals insert into extensor hoods of the phalanges, thus creating extension at the inter-phalangeal (PIP and DIP) joints. However, as the tendons also pass inferior to the metatarsal phalangeal (MTP) joints it creates flexion at this joint.
Absence of one or more; doubling of the third or fourth even the fifth. Insertion partly or wholly into the first phalanges.
Historyedit
The term "lumbrical" comes from the Latin, meaning "worm".[1]
Additional imagesedit
The lumbricals of the foot flex the metatarsophalangeal joints and extend the interphalangeal joints.
Referencesedit
This article incorporates text in the public domain from page 493 of the 20th edition ofGray's Anatomy(1918)
^ abcdBozer, Cüneyt; Uzmansel, Deniz; Dönmez, Didem; Parlak, Muhammed; Beger, Orhan; Elvan, Özlem (2018-12-01). "The effects of the communicating branch between medial and lateral plantar nerves on the innervations of the foot lumbrical muscles". Journal of the Anatomical Society of India. 67 (2): 130–132. doi:10.1016/j.jasi.2018.11.006. ISSN 0003-2778. S2CID 81678124.
lumbricals, foot, muscle, hand, lumbrical, muscle, hand, this, article, includes, list, references, related, reading, external, links, sources, remain, unclear, because, lacks, inline, citations, please, help, improve, this, article, introducing, more, precise. For the muscle of the hand see Lumbrical muscle hand This article includes a list of references related reading or external links but its sources remain unclear because it lacks inline citations Please help improve this article by introducing more precise citations May 2015 Learn how and when to remove this message The lumbricals are four small skeletal muscles accessory to the tendons of the flexor digitorum longus muscle They are numbered from the medial side of the foot 1 Lumbrical muscle of the footMuscles of the sole of the right foot viewed from below Second layer Lumbricals visible at bottom DetailsOriginMedial borders of long flexor tendonsInsertionProximal phalanges and extensor tendons of the 4 lateral toesArteryMedial and lateral plantar arteriesNerveMedial and lateral plantar nerves S3 ActionsFlexes metatarsophalangeal joints extends interphalangeal jointsIdentifiersLatinmusculus lumbricalis pedisTA98A04 7 02 069TA22685FMA37453Anatomical terms of muscle edit on Wikidata Contents 1 Structure 1 1 Innervation 1 2 Variation 2 History 3 Additional images 4 References 5 External linksStructure editThe lumbricals arise from the tendons of the flexor digitorum longus muscle 1 as far back as their angles of division each springing from two tendons except the first The first lumbrical is unipennate while the second third and fourth are bipennate The muscles end in tendons which pass forward on the medial sides of the four lesser toes and are inserted into the expansions of the tendons of the extensor digitorum longus muscle on the dorsal surfaces of the proximal phalanges 1 All four lumbricals insert into extensor hoods of the phalanges thus creating extension at the inter phalangeal PIP and DIP joints However as the tendons also pass inferior to the metatarsal phalangeal MTP joints it creates flexion at this joint Innervation edit The most medial lumbrical is innervated by the medial plantar nerve while the remaining three lumbricals are supplied by the lateral plantar nerve Variation edit Absence of one or more doubling of the third or fourth even the fifth Insertion partly or wholly into the first phalanges History editThe term lumbrical comes from the Latin meaning worm 1 Additional images edit nbsp The lumbricals of the foot flex the metatarsophalangeal joints and extend the interphalangeal joints References edit nbsp This article incorporates text in the public domain from page 493 of the 20th edition of Gray s Anatomy 1918 a b c d Bozer Cuneyt Uzmansel Deniz Donmez Didem Parlak Muhammed Beger Orhan Elvan Ozlem 2018 12 01 The effects of the communicating branch between medial and lateral plantar nerves on the innervations of the foot lumbrical muscles Journal of the Anatomical Society of India 67 2 130 132 doi 10 1016 j jasi 2018 11 006 ISSN 0003 2778 S2CID 81678124 External links editPTCentral Portal nbsp Anatomy nbsp This muscle article is a stub You can help Wikipedia by expanding it vte Retrieved from https en wikipedia org w index php title Lumbricals of the foot amp oldid 1222233058, wikipedia, wiki, book, books, library,
