Fibularis brevis muscle
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View Yahya Baba's current disclosures- Peroneus brevis
- Fibularis brevis
- Peroneus brevis muscle
The fibularis brevis muscle, also known as the peroneus brevis muscle, is a muscle in the lateral compartment of the leg. It lies deep/medial to the adjacent fibularis longus, and is a shorter and smaller muscle. Both brevis and longus travel together along the lateral aspect of the ankle within a shared synovial sheath 4. Together the tendons wrap around the lateral malleolus, specifically within the retromalleolar groove of the distal fibula.
At the level of the retromalleolar groove, the fibularis brevis tendon is located more anteromedial to the larger/rounder fibularis longus tendon. This can be remembered using the memory aid: "brevis closer to bone" (closer to the bones of the ankle, anteromedial to the peroneus longus tendon).
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Summary
origin: lower two thirds of lateral surface of the fibula
insertion: lateral tubercle at base of fifth metatarsal
innervation: superficial fibular nerve
action: plantar flexion and eversion of foot 4
Gross anatomy
Origin
lower two thirds of the lateral shaft of the fibula
Insertion
the fibularis brevis tendon passes down the leg deep to the fibularis longus muscle, and curves around the lateral malleolus creating the retromalleolar groove
both fibular tendons then course anteriorly toward the fibular trochlea of the lateral calcaneum, at which point the tendon of brevis runs superior to the trochlea before terminating at the tubercle of the base of the fifth metatarsal
Arterial supply
fibular artery
Innervation
superficial peroneal nerve (L5, S1)
Action
everts foot and weakly plantarflexes it
provides support for the lateral longitudinal arch
Antagonist
tibialis anterior
Variant anatomy
duplex belly fibularis brevis
fusion of fibularis brevis and fibularis longus
Quiz questions
References
- 1. Gray's Anatomy for Students: With STUDENT CONSULT Online Access. (2014) - Google Books
- 2. Keith L. Moore, Arthur F. Dalley, A. M. R. Agur. Clinically Oriented Anatomy. (2013) ISBN: 9781451119459 - Google Books
- 3. Chummy S. Sinnatamby. Last's Anatomy. (2011) ISBN: 9780702033940 - Google Books
- 4. Wang X, Rosenberg Z, Mechlin M, Schweitzer M. Normal Variants and Diseases of the Peroneal Tendons and Superior Peroneal Retinaculum: MR Imaging Features. Radiographics. 2005;25(3):587-602. doi:10.1148/rg.253045123 - Pubmed
Incoming Links
- Peroneus brevis tear
- Os vesalianum pedis
- Sciatic nerve motor distribution
- Accessory peroneal muscles
- Ankle joint
- Lateral compartment of the leg
- Fibular trochlea hypertrophy
- Iselin disease
- MRI of the ankle (an approach)
- Lateral ankle sprain
- Cuboideonavicular joint
- Sural neuropathy
- Fibula
- Peroneocalcaneus internus muscle
- Superficial peroneal nerve
- Cuneonavicular joint
- Peroneal retinaculum
- Peroneus tertius muscle
- Superficial peroneal nerve entrapment
- Lateral collateral ligament of the ankle
- Peroneal tendon intra-sheath subluxation
- Comminuted ankle fracture with possible fibular tendon entrapment
- Peroneus brevis subluxation
- Split tear of the peroneus brevis tendon
- Peroneus brevis split tear
- Peroneus brevis tear
- Concomitant peroneal tendons intrasubstance tear
- Peroneal tendons dislocation
- Peroneal tendons dislocation
- Plantar fasciitis - lateral cord
- Peroneal tubercle hypertrophy
- Peroneal tubercle hypertrophy
- Peroneus brevis tendon split tear
- Glass foreign body (ankle)
- Peroneal tubercle hypertrophy
- Peroneal tenosynovitis
- Peroneus brevis split tendon tear
- Peroneus brevis tear
- Peroneal tendon instability
- Peroneal tendon dislocation
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