The main objective of this case presentation is to look for uncommon anatomical variation of the muscle's innervations in the distal leg and foot

The extensor digitorum brevis (EDB) is typically innervated by the deep branch of the fibular nerve. The most common one is the accessory deep fibular nerve which arises from the deep or superficial fibular nerve, running posterior to the lateral malleolus and contributes to the innervation of muscles and sensory areas typically supplied by the deep fibular nerve. We present a dual innervation pattern of the EDB.

These NCS findings suggested an anomalous dual innervation of the EDB by both the tibial and fibular nerves, a rare anatomical variation that raised questions about the patient's nerve distribution in the lower extremity. The case highlights the importance of recognizing anatomical variations during nerve conduction studies to avoid misdiagnosis and optimize patient management.