Fibularis tertius

Fibularis tertius

Fibularis tertius (pronunciation: fi-bu-lar-is ter-shus) is a muscle of the human body, specifically located in the lower leg. It is also known as the peroneus tertius.

Etymology

The term "fibularis" is derived from the Latin word "fibula", which refers to the smaller of the two bones in the lower leg. The term "tertius" is Latin for "third", indicating that this is the third muscle in the fibularis group.

Anatomy

The fibularis tertius originates from the lower third of the anterior surface of the fibula and the adjacent part of the interosseous membrane. It inserts into the dorsal surface of the base of the fifth metatarsal bone. It is innervated by the deep fibular nerve.

Function

The fibularis tertius assists in dorsiflexion and eversion of the foot. This means it helps to lift the foot at the ankle and turn the sole of the foot outward.

Related Terms

• Fibularis longus
• Fibularis brevis
• Fibula
• Metatarsal bones
• Dorsiflexion
• Eversion
• Deep fibular nerve

See Also

• Muscular system
• Anatomy of the lower limb

External links

• Medical encyclopedia article on Fibularis tertius
• Wikipedia's article - Fibularis tertius

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