Long extensor of the big toe
A long extensor of the big toe , m. Extensor hallucis longus, lies between the two previous muscles, with the upper two thirds of the muscle covered with them. The muscle originates from the medial surface of the middle and lower thirds of the fibula and the interosseous membrane of the lower leg and, moving downwards, passes into a narrow long tendon that passes along the middle canal under retinaculum mm. Extensorum inferius to the large toe. Here the tendon is attached to the distal phalanx. Some of the bundles coalesce with the base of the proximal phalanx.
Function: unbends the thumb of the foot, takes part in the extension of the foot, lifting (spinning) its medial edge.
Innervation: n. Peroneus profundus (LIV-SI).
Blood supply: a. Tibialis anterior.
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