Peroneus Tertius

Description[edit | edit source]

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[edit | edit source]

Distal half or third of the fibula.[3]

Insertion[edit | edit source]

Base of the 5th metatarsal.[3]

Nerve[edit | edit source]

Deep peroneal nerve.[1]

Function[edit | edit source]

Secondary function in foot dorsiflexion and eversion.[3]

Clinical relevance[edit | edit source]

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[edit | edit source]

  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.