Boundaries
- Anterior: Anterior intermuscular septum.
- Posterior: Posterior intermuscular septum.
- Medial: Lateral surface of the fibula.
- Lateral: Deep fascia of the leg.
Contents
- Muscles: Peroneus longus and peroneus brevis.
- Nerve: Superficial peroneal nerve.
- Artery: The lateral compartment of the leg doesn’t have its own artery.
- Veins: Small unnamed veins largely drain into the short saphenous vein.
The contents of lateral compartment of the leg are supplied by the branches of the peroneal artery (a branch of posterior tibial artery) which reaches the lateral compartment by flexor hallucis longus and posterior intermuscular septum.
Muscles of The Lateral Compartment of The Leg
| Muscles | Origin | Insertion | Nerve supply | Actions |
|---|---|---|---|---|
| Peroneus longus (larger and lies superficial to the peroneus brevis) | 1. Upper 2/3rd of the lateral surface of the fibula 2. Adjoining surface of the lateral condyle of the tibia 3. Anterior and posterior intermuscular septa | 1. Lateral side of the base of the 1st metatarsal 2. Adjoining part of the medial cuneiform | Superficial peroneal nerve (L5; S1, S2) | 1. Eversion of the foot 2. Weak plantar flexion of the ankle 3. Maintains the lateral longitudinal arch |
| Peroneus brevis (smaller and lies deep to the peroneus longus) | 1. Lower 2/3rd of the lateral surface of the fibula 2. Anterior and posterior intermuscular septa | Lateral side of the base of the 5th metatarsal bone | Superficial peroneal nerve (L5; S1, S2) | 1. Eversion of the foot 2. Weak plantar flexion of the ankle 3. Maintains the lateral longitudinal arch |
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