Lumbrical muscle (foot)

Muscle infobox
Name = Lumbrical muscle of the foot
Latin = musculus lumbricalis pedis
GraySubject = 131
GrayPage = 493


Caption = Muscles of the sole of the foot. Second layer. (Lumbricals visible at bottom.)
Origin = Medial borders of long flexor tendons
Insertion = Proximal phalanges and extensor tendons of the 4 lateral toes
Action = Flexes meteatarsalpharangeal joints, extends distal interpharangeal and proximal interpharangeal
Blood = Medial and Lateral plantar arteries
Nerve = medial and lateral plantar nerves (S3)
MeshName =
MeshNumber =
DorlandsPre = m_22
DorlandsSuf = 12549758
:"For the muscle of the hand, see Lumbrical muscle (hand)."The Lumbricales are four small muscles, accessory to the tendons of the Flexor digitorum longus and numbered from the medial side of the foot; they arise from these tendons, as far back as their angles of division, each springing from two tendons, except the first.

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 on the dorsal surfaces of the first phalanges. All four lumbricals insert into extensor hoods of the phalanges, thus creating extension at the inter-phalangeal joints. However as the tendons also pass inferior to the metatarsal phalangeal joints it creates flexion at this joint.

Variations

Absence of one or more; doubling of the third or fourth even the fifth . Insertion partly or wholly into the first phalanges.

Innervation

The most medial lumbrical is innervated by the medial plantar nerve while the remaining three lumbricals are supplied by the lateral plantar nerve.

External links

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* [http://www.ptcentral.com/muscles/musclelegs.html#lumbricals PTCentral]