Fibularis muscles

Fibularis muscles
Fibularis (peroneus) muscles
Anatomical terms of muscle

The fibularis muscles (also called peroneus muscles or peroneals) are a group of muscles in the lower leg.

Description

The muscle group is normally composed of three muscles: fibularis longus, fibularis brevis, and fibularis tertius.

The fibularis longus and fibularis brevis are located in the lateral compartment of the leg and are supplied by the fibular artery and the superficial fibular nerve. The fibularis tertius is located in the anterior compartment of the leg and is supplied by the anterior tibial artery and the deep fibular nerve. While all three muscles move the sole of the foot outward, away from the midline of the body (eversion), the longus and brevis extend the foot downward away from the body (plantar flexion), whereas the tertius muscle pulls the foot upward toward the body (dorsiflexion).

Name Compartment Action Nerve Artery
Fibularis longus lateral compartment eversion and plantar flexion superficial fibular nerve fibular artery
Fibularis brevis lateral compartment eversion and plantar flexion superficial fibular nerve fibular artery
Fibularis tertius anterior compartment eversion and dorsiflexion deep fibular nerve anterior tibial artery

The fibularis muscles are highly variable. Several variants are occasionally present, including the peroneus digiti minimi and the peroneus quartus. The quartus is more closely associated with the tendons of the extensor digitorum longus and may send a small tendon to the fifth toe.

Nomenclature

Terminologia Anatomica designates "fibularis" as the preferred word over "peroneus.".

Additional images


This page was last updated at 2023-07-14 14:59 UTC. Update now. View original page.

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