Common Peroneal Nerve (L4 – S1)

  • Function: Extend and everts the foot and provide sensation to the lateral leg and dorsum of foot.
  • Anatomy:
    • After separating from the tibial nerve in the popliteal fossa, the CPN gives off the lateral cutaneous nerve of the calf, which supplies the lateral aspect of the leg.
    • Then it winds around the fibula and divides into superficial & deep branches.
    • The superficial peroneal nerve innervates the peronei mucles and the skin of the lateral leg and dorsum of the foot.
    • The deep peroneal nerve innervates all the ankle and toe extensors (TA, EHL, EDB, EDL) and supplies sensation to the web space between the first and second toes.

Common Peroneal Nerve 1Common Peroneal Nerve 2

Peroneus Muscles

Common Peroneal Nerve Muscles

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