Peroneus Longus

Peroneus Longus is one of the peroneal muscles which pass down the outside of the lower leg and evert (turn out) the foot. These muscles are sometimes referred to as fibularis longus and brevis due to their attchments on the fibula.

Origin

• Head of fibula
  
  
• Upper 2/3 of fibula

Insertion

• Base of underside of first metatarsal
  
  
• Undersurfaces of cuneiforms

Actions

• Eversion
  
  
• Plantarflexion

Innervation

• Superficial peroneal (fibular) nerve

Daily uses

• Walking on uneven surfaces

Example strengthening exercises

• Calf raises (bent knee)
  
  
• Seated calf raise machine

Example stretches

• Peroneal stretch

Related injuries

• Peroneal tendinopathy

Related muscles

• Peroneus brevis