
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
Information about cause and effect of Peroneus Brevis pain: Peroneus Longus and Peroneus Brevis Muscles: Low Leg, Ankle, Foot Pain