What nerve innervates the fibularis brevis?

• A. Tibial nerve
• B. Superficial fibular nerve
• C. Deep fibular nerve
• D. Common fibular nerve

Answer: (B)

Nerve supply to the fibularis brevis comes from the superficial peroneal (superficial fibular) nerve. This nerve branches from the common fibular nerve and travels through the lateral compartment of the leg, giving motor innervation to the fibularis longus and brevis. The tibial nerve serves the posterior compartment, the deep fibular nerve supplies the anterior compartment, and the common fibular nerve is the parent trunk that splits into these two branches. Knowing this, the superficial fibular nerve is the one that directly innervates fibularis brevis, enabling foot eversion.