Corpus: Deep peroneal nerve

The profundus fibular nerve is a mixed nerve branch of the common fibular nerve.

The profundus fibular nerve splits off at the bifurcation of the common fibular nerve between the fibula and the long fibular muscle. It pierces the anterior intermuscular septum cruris and runs medially and caudally below the extensor digitorum longus muscle, crossing the anterior surface of the interosseous membrane cruris. In the centre of the lower leg it connects with the anterior tibial artery. Together they run distally under the retinaculum musculorum extensorum superius. Once at the ankle joint, the profundus fibular nerve splits into its two end branches under the inferior extensor retinaculum.

• Ramus terminalis medialis
• Ramus terminalis lateralis (Ramus tarsalis)

The profundus fibular nerve supplies the following muscles:

• Musculus tibialis anterior
• Musculus extensor hallucis longus
• extensor hallucis brevis muscle
• Extensor digitorum longus muscle
• Musculus extensor digitorum brevis
• Musculus fibularis tertius

The sensitive parts of the profundus fibular nerve supply the skin between the first and second toes.