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Peroneus longus


Anatomy pictures

Fibularis/Peroneus longus

Fibularis longus - lateral
Fibularis longus - anterior
Fibularis longus - inferior

Fibularis/Peroneus brevis

Fibularis brevis - lateral view zoomed
Fibularis brevis - lateral view
Fibularis brevis - anterolateral view

Fibularis/Peroneus tertius

Fibularis tertius - anterior
Fibularis tertius - anterior

Referred pain pattern

Peroneals - pain pattern

Muscle type

  • Phasic
    • Weakens when overactivated


  • Weak ankles, with frequent ankle sprains
  • Entrapment of fibular nerve
  • Foot drop
  • Longstanding pain after earlier ankle fractures

Muscular attachments

Origin of fibularis longus

Fibularis longus insertion


Short version

Detailed version

Myofascial lines

Lateral line

Spiral line



  • Superficial
  • Distal tendon that runs underneath the foot is located deep


  • Lateral condyle tibiae
  • Caput fibula
  • Proximal 1/2 of lateral aspect of fibula
  • Septum intermusculare
  • Deep fascia of septum intermusculare


  • Os cuneiforme, medial aspect
  • 1. metatarsal, lateral aspect of basis

Main function

  • Tarsal-joint
    • Evertion
  • Ankel
    • Plantarflexion

Nerve innervation

  • Segmental
    • L5-S1
  • Peripheral
    • Superficial aspect of peroneal nerve

Arterial supply

  • Fibular artery