Peroneus Longus: Origin, Insertion, Action & Nerve Supply

Peroneus Longus : The peroneus longus ( fibularis longus) is a superficial muscle in the lateral compartment of the leg muscles and works to evert and plantarflex the ankle joint.

Origin: The muscle is originated to the head of the fibula, upper 1/2 – 2/3 of the lateral fibular surface; also anterior and posterior intermuscular septa of the leg.

Insertion: posteriorly around the lateral malleolus of the ankle and lateral side of the 1st metatarsal base.

Function: Everts foot and plantar flex the ankle joint; also serves to support the transverse arch of the foot

Nerve Supply: Superficial peroneal nerve (L5, S1, S2); may further receive additional innervation from common or deep peroneal nerves.

Muscles of the Lower Limb

Leg Muscles
Thigh Muscles
Foot Muscles