Peroneus Longus - Muscle Physiology & Functional Anatomy


Peroneus Longus Muscle




  • Upper two thirds of lateral shaft of fibula , head of fibula and superior tibiofibular joint


  • Lateral surface of the medial cuneiform & plantar aspect (lateral side) of base of 1st metatarsal

Major Arteries:

  • Fibular (peroneal) artery


Neural Innervation:

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


Trigger Points: 

Trigger points for the peroneus longus




Concentric Functions:

  • Plantar flexion & eversion (pronation) of the foot

Eccentric Functions:

  • Decelerates ankle dorsiflexion

Isometric Function:

  • Helps stabilizes the foot & ankle complex

  • Supports the (lateral longitudinal & transverse) arches of the foot

Related Muscles





More Images of the Peroneus Longus Muscle

Peroneus Longus

More Information about the Peroneus Longus Muscle

The peroneus longus muscle sometimes referred to the fibularis longus, is the largest & most superficial of 3 peroneal muscles.  The terms peroneus & peroneal are derived from the Greek word "Perone" meaning pin of a brooch or a buckle. In medical terminology, both terms refer to being of or relating to the fibula or to the outer portion of the leg.


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