Fibularis Longus

Joe Muscolino

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The fibularis longus muscle of the lateral compartment of the (lower) leg.

The Fibularis Longus is located in the Lateral Compartment of the (lower) leg. The muscles in the lateral compartment are:



  • Proximal lateral fibula to the first cuneiform and first metatarsal.
    • The fibularis longus attaches proximally onto the proximal 1/2 of the lateral fibula.



  • Everts (Pronates) the foot at the subtalar joint.
  • Plantarflexes the foot at the ankle joint.



  1. The fibularis longus and tibialis anterior are named together as the stirrup muscles because they both attach onto the first cuneiform and first metatarsal and support the foot like a stirrup.
  2. The fibularis longus used to be named the peroneus longus; it was renamed at an Anatomy Congress in 1999.
  3. Eversion is the principal cardinal-plane (frontal-plane) component of the oblique-plane motion pattern of pronation.