peroneus longus(redirected from Peronæi longus)
peroneus longusLong fibular muscle (see there); musculus peroneus longus [NA6].
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