Which cutaneous nerve supplies the medial aspect of the leg?

The saphenous nerve is the cutaneous nerve that supplies sensation to the medial aspect of the leg. It is a branch of the femoral nerve and runs down the medial portion of the leg, providing sensory innervation to the skin in this area. The saphenous nerve travels alongside the great saphenous vein and is important for conveying sensory information from the skin covering the medial side of the leg and foot.

In contrast, other nerves listed have different sensory distributions. The tibial nerve mainly innervates the posterior compartment of the leg and contributes to sensation in the plantar aspect of the foot. The sural nerve primarily supplies sensation to the lateral aspect of the leg and the lateral side of the ankle and foot. The peroneal nerve (also known as the common fibular nerve) mainly innervates the lateral compartment and provides sensation to the dorsum of the foot.

Therefore, the correct answer is the saphenous nerve, which is specifically responsible for the sensory innervation of the medial aspect of the leg.