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KMID : 0855520180310010035
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Korean Journal of Physical Anthropology
2018 Volume.31 No. 1 p.35 ~ p.39
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Muscular Variations of Extensor Digitorum Brevis Muscle Related with Anterior Tarsal Tunnel Syndrome
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Won Hyung-Jin
Oh Chang-Seok
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Abstract
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During routine dissection, additional muscular head of extensor digitorum brevis muscle attaching to the third toe and accessory muscle perforated by the branch of the deep peroneal nerve were observed in the right foot of a 71-year-old male cadaver. The additional muscular head originated from the dorsal surface of cuboid bone, and ran parallel with the third tendon of the extensor digitorum brevis muscle. It was conjoined with the third tendon of extensor digitorum brevis at the middle of its course. The accessory muscle was a small muscle which was covered with the muscle belly of the extensor hallucis brevis muscle. It originated from the dorsal surface of the calcaneus, and inserted to the lateral one-third of transverse retinacular band. These two variants were innervated by the branches of deep peroneal nerve. The branches of deep peroneal nerve were compressed under the tendon of extensor hallucis brevis and around the site where the nerve branch perforated the small muscle. The clinical significances of these variations and tendon of extensor hallucis brevis muscle were discussed.
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KEYWORD
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Anterior tarsal tunnel syndrome, Deep peroneal nerve, Extensor digitorum brevis, Extensor hallucis brevis, Entrapment syndrome
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