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Journal of the Korean Academy of Rehabilitation Medicine 2000;24(6):1223-1228.
Extensor Digitorum Brevis Innervated by the Tibial Nerve (All Tibial Foot): A case report.
Lee, So Young , Yoon, Seo Ra , Choi, In Sung , Lee, Sam Gyu , Rowe, Sung Man
Department of Rehabilitation Medicine, Chonnam National University College of Medicine.
단지신근의 경골신경 지배 ⁣증례 보고⁣
이소영, 윤서라, 최인성, 이삼규, 노성만
전남대학교 의과대학 재활의학교실

Innervation anomalies are well-known sources of erroneous interpretation in motor nerve conduction studies. The extensor digitorum brevis (EDB) muscle is supplied by the deep peroneal nerve and is commonly used as recording point in peroneal motor conduction study. If the compound muscle action potentials (CMAPs) are not evoked with EDB muscle recording without any symptoms or signs of peroneal neuropathy, we should lead one to consider either technical pitfall or anomalous innervation. We experienced an anomalous innervation in a woman in whom the bilateral EDB muscles were innervated exclusively by the tibial nerve. This was proved using a monopolar needle electrode for recording in extensor digitorum brevis (EDB) and flexor digitorum brevis (FDB) muscles, which encoded acceptable shape of CMAPs on tibial nerve stimulation. To avoid erroneous interpretation of electromyographic and nerve con

Key Words: Innervation anomalies, Extensor digitorum brevis, All tibial foot
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