Which nerve innervates both extensor digitorum brevis and extensor hallucis brevis?

Which nerve innervates both extensor digitorum brevis and extensor hallucis brevis?

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

Answer: (D)

Muscles on the dorsum of the foot that extend the toes share motor supply from the deep fibular (deep peroneal) nerve. This nerve runs with the anterior compartment muscles of the leg and onto the dorsum of the foot, where it innervates both the extensor digitorum brevis and the extensor hallucis brevis. Those two small dorsal foot muscles rely on the deep fibular nerve for their motor function, enabling toe extension. The other nerves listed primarily serve plantar muscles or different regions, whereas the deep fibular nerve specifically supplies these dorsal intrinsic extensors.

Muscles on the dorsum of the foot that extend the toes share motor supply from the deep fibular (deep peroneal) nerve. This nerve runs with the anterior compartment muscles of the leg and onto the dorsum of the foot, where it innervates both the extensor digitorum brevis and the extensor hallucis brevis. Those two small dorsal foot muscles rely on the deep fibular nerve for their motor function, enabling toe extension. The other nerves listed primarily serve plantar muscles or different regions, whereas the deep fibular nerve specifically supplies these dorsal intrinsic extensors.