MuscleLeg — lateral compartment
Peroneus longus
Latin: M. peroneus longus
Location: Leg
View the peroneus longus in 3DOrigin
Head and upper two-thirds of the lateral surface of the fibula.
Insertion
Plantar base of the first metatarsal and medial cuneiform, tunnelling across the sole.
Action
Plantarflexes and everts the foot; its plantar sling buttresses the transverse arch.
Nerve supply
Superficial peroneal nerve (L5–S1).
Blood supply
Peroneal artery.
Clinical relevance
Its tendon clicks around the lateral malleolus in subluxation; it crosses the cuboid's tunnel where painful os peroneum syndrome develops.
Educational anatomy reference, not medical advice. About this content.