Peroneus tertius muscle
Citation, DOI, disclosures and article data
Citation:
Hacking C, Bell D, Sabahi Z, et al. Peroneus tertius muscle. Reference article, Radiopaedia.org (Accessed on 21 Mar 2025) https://doi.org/10.53347/rID-40284
rID:
40284
Article created:
Disclosures:
At the time the article was created Craig Hacking had no recorded disclosures.
View Craig Hacking's current disclosures
Last revised:
Disclosures:
At the time the article was last revised Daniel J Bell had no recorded disclosures.
View Daniel J Bell's current disclosures
Revisions:
13 times, by
9 contributors -
see full revision history and disclosures
Systems:
Sections:
Synonyms:
- Fibularis tertius muscle
- Fibularis tertius
The peroneus tertius muscle, also known as fibularis tertius muscle, is a muscle of the anterior compartment of the leg, despite its name suggesting it is in the lateral compartment. It aids in dorsiflexion and eversion of the foot.
On this page:
Summary
-
origin: inferior 1/3rd of anterior surface of fibula and interosseous membrane below the extensor digitorum longus
- some authors describe the muscles as arising from the lateral margin of the extensor digitorum longus muscle
- insertion: dorsal surface of the 5th metatarsal base and with a so-called falciform extension to the superior surface of that bone
- innervation: deep peroneal nerve
- action: dorsiflexion and foot eversion
Gross anatomy
Its tendon passes anterior to the lateral malleolus (unlike peroneus brevis and longus which pass posterior), deep to the inferior extensor retinaculum to become enclosed in a common tendon sheath with the tendons of the extensor digitorum longus muscle.
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Arterial supply
Variant anatomy
It may be absent or associated with other peroneus accessory muscles.
The prevalence of the peroneus tertius muscle, determined by cadaveric dissection, has been found to be 93.2% 4.
References
- 1. Chummy S. Sinnatamby. Last's Anatomy. (2018) ISBN: 9780702033940
- 2. Moore KL, Agur AMR, Dalley AF. Clinically oriented anatomy. LWW. ISBN:1451119453. Read it at Google Books - Find it at Amazon
- 3. Susan Standring. Gray's Anatomy. ISBN: 9780702052309
- 4. Yammine K, Erić M. The Fibularis (Peroneus) Tertius Muscle in Humans: A Meta-Analysis of Anatomical Studies with Clinical and Evolutionary Implications. (2017) BioMed research international. 2017: 6021707. doi:10.1155/2017/6021707 - Pubmed 4.
Incoming Links
Articles:
- Anterior compartment of the leg
- Accessory peroneal muscles
- Sciatic nerve motor distribution
- Accessory muscles of the ankle
- MRI of the ankle (an approach)
- Deep peroneal nerve entrapment
- Deep peroneal nerve
- Fibula
- Anterior tarsal tunnel
- Extensor retinaculum (foot)
- Muscles of the lower limb
- Anterior lateral malleolar artery
- Metatarsal
- Anterior fibulocalcaneus muscle
Multiple choice questions:
Related articles: Anatomy: Lower limb
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