Fibularis muscles
The fibularis muscles (also called peroneus muscles or peroneals) are a group of muscles in the lower leg.
| Fibularis muscles | |
|---|---|
 Fibularis (peroneus) muscles | |
| Anatomical terms of muscle |
Description
The muscle group is normally composed of three muscles: fibularis longus, fibularis brevis, and fibularis tertius.[1]
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.[2] The quartus is more closely associated with the tendons of the extensor digitorum longus and may send a small tendon to the fifth toe.[3]
Nomenclature
Terminologia Anatomica designates "fibularis" as the preferred word over "peroneus.".[4]
Additional images
Animation: Fibularis (peroneus) muscles seen from below
Fibularis (peroneus) muscles labeled at center left
References
- "Peroneal Muscles". www.earthslab.com.
- Chaitow, Leon; Walker DeLany, Judith (2000). Clinical Application of Neuromuscular Techniques: The Lower Body. Elsevier Health Sciences. p. 554. ISBN 0-443-06284-6.
- Platzer, Werner (2004). Color Atlas of Human Anatomy, Vol. 1: Locomotor System (5th ed.). Thieme. p. 260. ISBN 3-13-533305-1.
- FIPAT (2019). Terminologia Anatomica. Federative International Programme for Anatomical Terminology.
