Peroneus Tertius

Original Editor - Lilian Ashraf

Top Contributors - Claire Testa, Kim Jackson and Lilian Ashraf

Description

Peroneus tertius muscle

The Peroneus Tertius muscle also called the Fibularis Tertius is one the 3 peroneal muscles (peroneus longus, peroneus brevis).[1] It is absent in 5% to 17% of the human white population.[2]

Origin

Distal half or third of the fibula.[3]

Insertion

Base of the 5th metatarsal.[3]

Nerve

Deep peroneal nerve.[1]

Function

Secondary function in foot dorsiflexion and eversion.[3]

Clinical relevance

The strength of eversion and dorsiflexion is not compromised in people who lack the Peroneus Tertius muscle. Peroneus Tertius seems to not provide higher protection against ankle ligamentous injury.[2]

References

  1. 1.0 1.1 Lippert, Lynn S. Clinical Kinesiology and Anatomy. 5th ed. Philadelphia: F A Davis Company; 2016.
  2. 2.0 2.1 Witvrouw E, Vanden Borre K, Willems TM, Huysmans J, Broos E, De Clercq D. The significance of peroneus tertius muscle in ankle injuries: a prospective study. The American journal of sports medicine. 2006 Jul;34(7):1159-63.
  3. 3.0 3.1 3.2 Witvrouw E, Vanden Borre K, Willems TM, Huysmans J, Broos E, De Clercq D. The significance of peroneus tertius muscle in ankle injuries: a prospective study. The American journal of sports medicine. 2006 Jul;34(7):1159-63.