| Fibularis muscles | |
|---|---|
 Fibularis (peroneus) muscles | |
| Details | |
| Identifiers | |
| Latin | musculus fibularis |
| Anatomical terms of muscle | |
Thefibularis muscles (also calledperoneus muscles orperoneals) are a group of muscles in the lowerleg.
The muscle group is normally composed of three muscles:fibularis longus,fibularis brevis, andfibularis tertius.[1]
The fibularis longus and fibularis brevis are located in thelateral compartment of the leg and are supplied by thefibular artery and thesuperficial fibular nerve. The fibularis tertius is located in theanterior compartment of the leg and is supplied by theanterior tibial artery and thedeep 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 andplantar flexion | superficial fibular nerve | fibular artery |
| Fibularis brevis | lateral compartment | eversion and plantar flexion | superficial fibular nerve | fibular artery |
| Fibularis tertius | anterior compartment | eversion anddorsiflexion | 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 theextensor digitorum longus and may send a small tendon to the fifth (or little) toe.[3]
Terminologia Anatomica designates "fibularis" as the preferred word over "peroneus".[4]
