MuscleLeg — lateral compartment
Peroneus brevis
Latin: M. peroneus brevis
Location: Leg
View the peroneus brevis in 3DOrigin
Lower lateral fibula.
Insertion
Tubercle of the fifth metatarsal base.
Action
Everts the foot and plantarflexes the ankle — the ankle's lateral stabiliser against inversion sprains.
Nerve supply
Superficial peroneal nerve (L5–S1).
Blood supply
Peroneal artery.
Clinical relevance
An inversion injury can avulse its insertion — the fifth metatarsal tuberosity ('pseudo-Jones') fracture; peroneal tendon tears follow chronic ankle instability.
Educational anatomy reference, not medical advice. About this content.