Fibularis tertius at a glance
- Also called
- Peroneus tertius
- What it is
- A small muscle of the anterior leg, sometimes absent.
- Location
- Origin: distal third of the anterior fibula. Insertion: dorsal surface of the base of the 5th metatarsal.
- Function
- Dorsiflexes the ankle and assists eversion of the foot.
- Body system
- Muscular · paired (left and right)
- FMA ID
- FMA22550 (Foundational Model of Anatomy)
Key facts
- Innervation: deep fibular nerve (L5–S1)
- Despite its name it belongs to the anterior compartment and is effectively a lateral slip of extensor digitorum longus.
- It is absent in a minority of people.
Structures next to the fibularis tertius
The nearest named structures in the 3D model, measured from the centre of each part:
- Lateral tarsal artery · cardiovascular
- Talus · skeletal
- Dorsalis pedis artery · cardiovascular
- Navicular bone of foot · skeletal
- Lateral cuneiform bone · skeletal
- Cuboid bone · skeletal
- Intermediate cuneiform bone · skeletal
- Fibularis brevis · muscular
- Dorsal venous arch of foot · cardiovascular
- Long plantar ligament · skeletal
References
- Foundational Model of Anatomy: Fibularis tertius (FMA22550). EMBL-EBI Ontology Lookup Service.
- OpenStax. Anatomy and Physiology 2e, §11.2 Naming Skeletal Muscles. Rice University, 2022.
- Mitsuhashi N. et al. (2009). BodyParts3D: 3D structure database for anatomical concepts. Nucleic Acids Research 37, D782–D785. Data © The Database Center for Life Science, CC BY 4.0.
Related anatomy
Explore the whole body in the interactive 3D human anatomy model, or browse the A–Z list of human structures.