Short extensor of fingers
Short extensor of fingers , m. Extensor digitorum brevis, - a flat muscle, lying directly on the back surface of the foot. It originates from the upper and lateral surfaces of the anterior part of the calcaneus and, moving anteriorly, passes into four narrow tendons. They fuse in the distal part with the tendons of the long extensor of the fingers and attach to the base of the proximal, middle and distal phalanges of the II-V fingers, weaving in the dorsal fascia of the foot. Sometimes the tendon to the little finger is absent.
Function: unbends the II-IV toes of the foot, pulls them to the lateral side.
Innervation: n. Peroneus profundus (LIV -SI).
Blood supply: a. Tarsea lateralis, r. Perforans a. Peroneae.
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