peroneus brevis

(redirected from Peronaeus brevis)

peroneus brevis

Etymology: Gk, perone + L, brevis, short
the smaller of the two lateral muscles of the leg, lying under the peroneus longus. It pronates and plantar flexes the foot. Compare peroneus longus.
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Peroneus brevis and peroneus longus

fibularis brevis

A muscle of the knee that arises from the distal two-thirds of the lateral fibula and the anterior and posterior crural intermuscular septa.

Everts and plantarflexes foot.
Superficial peroneal nerve.
Lateral base of the 5th metatarsal.

peroneus brevis

The muscle arising from the distal two thirds of the lateral fibula and attaching to the styloid process of the base of the fifth metatarsal. The peroneus brevis assists in plantar flexion of the foot and eversion of the ankle.
See also: peroneus

peroneus brevis

; PB extrinsic foot muscle within the lateral compartment of lower leg
  • origin lower two-thirds of lateral surface of fibula, underlying the belly of peroneus longus

  • insertion tendon courses along lateral side of fibula, deep to peroneus longus (PL), lying within groove at posterior area of lateral malleolus (where it shares a common synovial sheath with PL tendon), deep to superior peroneal retinaculum; PB and PL tendons lie on lateral aspect of calcaneum and cuboid

  • nerve supply superficial peroneal nerve

  • action foot eversion at subtalar joint; ankle joint plantarflexion of the ankle joint