Peroneus brevis

The peroneus brevis (Latin: musculus peroneus brevis; musculus fibularis brevis), also known as the fibularis brevis, is a small and relatively short muscle located in the lateral compartment of the lower leg inferior to the peroneus longus. It extends between the fibula and fifth metatarsal bone. The distal aspect of the muscle forms a tendon that runs just posterior to the lateral malleolus and crosses the ankle.

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Peroneus brevis by Anatomy Next
Peroneus brevis
OriginDistal two-thirds of lateral surface of fibula
InsertionTuberosity of 5th metatarsal bone
ActionFoot plantar flexion, foot eversion, supports lateral longitudinal arch of foot
InnervationSuperficial peroneal (fibular) nerve (L5 - S2)
Blood supply Peroneal (fibular) artery

Origin

The peroneus longus originates from the distal two-thirds of the lateral surface of the fibula.

Insertion

The peroneus brevis inserts on the tuberosity of the fifth metatarsal bone.

Peroneus brevis, Fibularis brevis, Insertion of peroneus brevis, Insertion of fibularis brevis, Lateral compartment of leg, Lateral compartment muscles, Leg muscles, Human foot
Insertion of peroneus brevis by Anatomy Next

Action

The peroneus brevis provides plantar flexion of the foot at the talocrural (ankle) joint and foot eversion at the subtalar joint. Also, it supports the lateral longitudinal arch of the foot.

Innervation

The peroneus brevis is innervated by the superficial peroneal (fibular) nerve (L5 - S2) - a branch of the common peroneal (fibular) nerve.

Blood supply

The peroneus brevis muscle receives arterial blood supply from the peroneal (fibular) artery - a branch of the posterior tibial artery.