Fibularis Longus

Musculus fibularis longus

Lower Body LegsCalves

The fibularis longus is the longest and most superficial of the lateral compartment muscles; it everts the foot and assists plantarflexion while supporting the arches as its tendon wraps under the sole. It is a key ankle stabilizer that resists inversion sprains and is important for lateral and cutting movements. Training it (banded eversions, single-leg balance work) improves ankle resilience.

Actions

Foot eversion, Ankle plantarflexion

Origin

Head and upper two-thirds of the lateral surface of the fibula and the lateral tibial condyle

Insertion

Plantar surface of the medial cuneiform and base of the first metatarsal (tendon passes behind the lateral malleolus and crosses the sole of the foot)

Innervation

Superficial fibular (superficial peroneal) nerve (L5, S1)

Blood supply

Fibular (peroneal) and anterior tibial arteries

Wikipedia ↗

legseversionplantarflexionlateral-compartmentankle-stability