Which nerve innervates extensor digitorum brevis?

Which nerve innervates extensor digitorum brevis?

• A. Medial Plantar Nerve
• B. Deep Fibular Nerve
• C. Lateral Plantar Nerve
• D. Tibial Nerve

Answer: (B)

The deep fibular nerve provides motor to the extensor digitorum brevis. This small muscle sits on the dorsum of the foot and is innervated by the nerve that supplies muscles in the dorsal/dorsum region—the deep fibular (peroneal) nerve. The other nerves listed are branches associated with the plantar aspect of the foot (medial and lateral plantar nerves) or the tibial nerve, which overall gives rise to those plantar branches but does not directly innervate dorsum muscles like extensor digitorum brevis. So, the nerve that correctly innervates this muscle is the deep fibular nerve.

The deep fibular nerve provides motor to the extensor digitorum brevis. This small muscle sits on the dorsum of the foot and is innervated by the nerve that supplies muscles in the dorsal/dorsum region—the deep fibular (peroneal) nerve. The other nerves listed are branches associated with the plantar aspect of the foot (medial and lateral plantar nerves) or the tibial nerve, which overall gives rise to those plantar branches but does not directly innervate dorsum muscles like extensor digitorum brevis. So, the nerve that correctly innervates this muscle is the deep fibular nerve.