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Extensor digitorum longus

Other Terms: Musculus extensor digitorum longus, Muscle long extenseur des orteils

Muscle parts

None

Latin name

Musculus extensor digitorum longus

Latin muscle parts

None

Group

Crural muscle – anterior compartment

Etymology

In English this muscle’s name is the long muscle that straightens the toes. The word extensor comes from the Latin ex meaning “out from” and tendere meaning “to stretch.” The term digitorum is from the Latin digitus, which originally meant the “pointing thing,” a term that is similar to the Sanskrit word “dic” meaning to show or point out. Because we point with our fingers the term was applied to the fingers and then the toes. Longus is the Latin term meaning “long.” This is being used as a comparative reference to a shorter muscle that does the same thing.

Origin

Lateral condyle of the tibia, proximal 3/4ths of the medial surface of the fibula, and the adjacent interosseous membrane.

Insertion

Middle phalanx and distal phalanx of the four lesser toes via the extensor expansion.

Action

Dorsal flexion of the ankle joint; extension of the four small toes

Nerve supply

Deep peroneal nerve (L5 and S1)

Blood supply

The muscle belly is supplied by muscular branches from the anterior tibial artery. From proximal to distal the tendon of the muscle receives blood supply from the anterior lateral malleolar artery, tarsal branches of the dorsalis pedis artery, and the second to fourth dorsal metatarsal arteries.

Latin

Musculus extensor digitorum longus

French

Muscle long extenseur des orteils

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