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Fibularis longus

Other Terms: Peroneus longus, Musculus fibularis longus, Musculus peroneus longus, Muscle long fibulaire

Muscle parts

None

Latin name

Musculus fibularis longus or Musculus peroneus longus

Latin muscle parts

None

Group

Crural muscle – lateral compartment

Etymology

The English name for this muscle is the long muscle of the pointed bone. The word peroneus is from the Greek perone meaning “anything sharp or pointed.” This was an alternate term for the fibula, which is a Latin word designating a “buckle or brooch.” It arises from the Latin word figo meaning “to fasten.” In some animals the bone is short and pointed at its distal end where it abuts the tibia. This appearance resembled a needle to its brooch. Longus is the Latin term meaning “long.” This is being used as a comparative reference to a shorter muscle that does the same thing.

Origin

Lateral surface of the head and the proximal 2/3rds of the fibula.

Insertion

Lateral side of the base of the first metatarsal bone, lateral side of the base of the medial cuneiform, and the inferior base of the second metatarsal bone

Action

Plantar flexion of the ankle joint; eversion of the foot; helps maintain the longitudinal and transverse arches of the foot.

Nerve supply

Superficial peroneal nerve (L5 and S1)

Blood supply

From proximal to distal, the belly of the muscle is supplied by the inferior lateral genicular artery, the anterior tibial artery, anterior tibial recurrent artery, posterior tibial recurrent artery, circumflex fibular artery, muscular branches from the fibular (peroneal) artery. The tendon is supplied by the anterior lateral malleolar artery, lateral calcaneal artery, lateral tarsal artery, lateral plantar artery, and the medial plantar artery.

Latin

Musculus fibularis longus

Latin

Musculus peroneus longus

French

Muscle long fibulaire

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