Peroneus Tertius Anatomy

Peroneus Brevis Muscle

Origin: Distal two-thirds of the lateral surface of the fibula, and the anterior and posterior intermuscular septa
Insertion: Tubercle on the base of the lateral aspect of the fifth metatarsal
Actions: Eversion of the foot
Innervation: Superficial Peroneal Nerve (L5, S1)
Blood Supply: Branches of the posterior tibial artery

Primary Actions of the Peroneus Brevis

1. Eversion of the foot at the subtalar joint
  Agonists:
  • Peroneus Longus
  Antagonists:
  • Tibialis Anterior
  • Tibialis Posterior

 

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