peroneus-anatomy

Peroneus Longus Muscle

Origin: The lateral head and the upper 2/3 of the lateral surface of the fibula and the anterior and posterior intermuscular septa of the leg.
Insertion: The base of the 1st metatarsal bone and the medial cuneiform
Actions: Eversion of the foot
Innervation: Superficial Peroneal Nerve (L5, S1)
Blood Supply: Branches of the posterior tibial artery

Primary Actions of the Peroneus Longus

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

 

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Secondary Actions of the Peroneus Longus

1. Assists with plantar flexion of the foot at the ankle
  Agonists:
  • Gastrocnemius
  • Soleus
  Antagonists:
  • Tibialis Anterior