Which nerve innervates extensor hallucis brevis?

Which nerve innervates extensor hallucis brevis?

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

Answer: (C)

Extensor hallucis brevis is a small muscle on the dorsum of the foot that helps extend the big toe at the metatarsophalangeal joint. It is innervated by the deep fibular (deep peroneal) nerve, a branch of the common fibular nerve. This nerve supplies the muscles of the anterior compartment of the leg and the intrinsic dorsum foot muscles, including extensor hallucis brevis and extensor digitorum brevis. The medial and lateral plantar nerves are branches of the tibial nerve and mainly supply the plantar intrinsic muscles on the sole, not the dorsum muscles. So the deep fibular nerve is the specific innervation for extensor hallucis brevis.

Extensor hallucis brevis is a small muscle on the dorsum of the foot that helps extend the big toe at the metatarsophalangeal joint. It is innervated by the deep fibular (deep peroneal) nerve, a branch of the common fibular nerve. This nerve supplies the muscles of the anterior compartment of the leg and the intrinsic dorsum foot muscles, including extensor hallucis brevis and extensor digitorum brevis. The medial and lateral plantar nerves are branches of the tibial nerve and mainly supply the plantar intrinsic muscles on the sole, not the dorsum muscles. So the deep fibular nerve is the specific innervation for extensor hallucis brevis.