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Lumbricals of foot
Other Terms:
Lumbricals of foot,
Musculus lumbricales pedis
Muscle parts
None
Latin name
Musculi lumbricales (pes)
Latin muscle parts
None
Group
Foot muscle – plantar group – second layer
Etymology
This muscle’s name in English is the worm muscle. The word lumbrical comes from the Latin lumbricus meaning “worm.”
Origin
First lumbrical arises from the big toe side of the flexor digitorum longus tendon, the other three lumbricals each arise from the adjacent sides of the flexor digitorum longus tendons.
Insertion
Pass anterior to the metatarsal phalangeal joint and wrap dorsally to join the extensor expansion of digits 2, 3, 4, and 5.
Action
Flexion of metatarso-phalangeal joints; extension of interphalangeal joints.
Nerve supply
Medial plantar nerve (S2 and S3) supplies the 1st lumbrical and the lateral plantar nerve (S2 and S3) supplies the other lumbricals
Blood supply
From proximal to distal the muscle is supplied by the lateral plantar artery, small branches from the plantar arch, and the four plantar metatarsal arteries.
Latin
Musculus lumbricales pedis
