Muscle
Fibularis tertius
Dorsiflexes and everts (variable)
High-yield
Anterior compartment but everts the foot; deep fibular nerve (unlike the other everters).
Overview
A partly separated distal slip of EDL in the anterior compartment that dorsiflexes and everts the foot; often absent.
Reference facts
- Origin
- Distal anterior surface of the fibula and interosseous membrane
- Insertion
- Base of the 5th metatarsal
- Action
- Dorsiflexes the ankle and everts the foot
- Innervation
- Deep fibular (peroneal) nerve (L5, S1)
- Blood supply
- Anterior tibial artery
Frequently asked questions
What does the fibularis tertius do?
The fibularis tertius dorsiflexes the ankle and everts the foot.
What nerve innervates the fibularis tertius?
The fibularis tertius is innervated by the deep fibular (peroneal) nerve (L5, S1).
Where does the fibularis tertius attach?
The fibularis tertius originates from the distal anterior surface of the fibula and interosseous membrane and inserts on the base of the 5th metatarsal.
What is the blood supply of the fibularis tertius?
The fibularis tertius is supplied by the anterior tibial artery.