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The common fibular nerve (also known as common peroneal nerve, peroneal nerve, external popliteal nerve, lateral popliteal nerve) is a mixed nerve and constitutes the lateral terminal branch of the sciatic nerve. It innervates the muscles of the anterolateral compartment of the leg and of the dorsal face of the foot, essentially through its terminal branches, the deep and superficial fibular nerves.

The sciatic nerve is a mixed nerve. It is the largest nerve in the human body. Its path is posterior to the root of the lower body, under the buttock, until the popliteal fossa, at which point it splits into two terminal branches: the tibial nerve and the common fibular nerve. The sciatic nerve trunk innervates the muscles of the posterior compartment of the thigh.

The common fibular nerve (also known as common peroneal nerve, peroneal nerve, external popliteal nerve, lateral popliteal nerve) is a mixed nerve and constitutes the lateral terminal branch of the sciatic nerve. It innervates the muscles of the anterolateral compartment of the leg and of the dorsal face of the foot, essentially through its terminal branches, the deep and superficial fibular nerves.