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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.
|Origin||Distal two-thirds of lateral surface of fibula|
|Insertion||Tuberosity of 5th metatarsal bone|
|Action||Foot plantarflexion, foot eversion, supports lateral longitudinal arch of foot|
|Innervation||Superficial peroneal (fibular) nerve (L5 - S2)|
|Blood supply||Peroneal (fibular) artery|
The peroneus longus originates from the distal two-thirds of the lateral surface of the fibula.
The peroneus brevis inserts on the tuberosity of the fifth metatarsal bone.