Short extensor of the big toe
Short extensor of the big toe , m. Extensor hallucis brevis, lies within the previous muscle. It starts from the upper surface of the anterior part of the calcaneus and, moving forward and medially, passes into a tendon attached to the base of the proximal phalanx of the thumb. In the distal part, the tendon fuses with the tendon m. Extensoris hallucis longi, taking part in the formation of the dorsal fascia of the foot.
Function: unbends the thumb of the foot.
Innervation: n. Peroneus profundus (LIV-LV, SI).
Blood supply: a. Tarsea lateralis, r. Perforans a. Peroneae.
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