peroneus longus

(redirected from Peroneous longus)

peroneus longus

the more superficial of the two lateral muscles of the leg. The muscle pronates and plantar flexes the foot. Compare peroneus brevis.

peroneus longus

Long fibular muscle (see there); musculus peroneus longus [NA6].

peroneus longus

The muscle arising from the lateral tibial condyle and the upper two thirds of the fibula and inserting on the lateral aspect of the first metatarsal and the associated portion of the first cuneiform. The peroneus longus is the primary contributor to the plantar flexion of the foot and the eversion of the ankle.
See also: peroneus

peroneus longus

; PL extrinsic foot muscle, within lateral compartment of lower leg
  • origin upper two-thirds of lateral surface of fibula, PL belly overlying belly of peroneus brevis

  • insertion tendon courses along lateral side of fibula, superficial to peroneus brevis (PB), lying in a common sheath with tendon of PB (see peroneus brevis); within the foot, PL tendon turns (in groove on interior aspect of cuboid) to run obliquely across deep area of sole of foot (i.e. sixth layer) and inserts into plantar aspect of medial cuneiform and first metatarsal base

  • nerve supply superficial peroneal nerve

  • action foot eversion at subtalar joint; ankle joint plantarflexion; increase in curvature of midfoot transverse arch