The External Popliteal Nerve is a branch of considerable size given off from the great sciatic near to the gemini muscles. It then passes downward and forward between the biceps femoris and the outer head of the gastrocnemius. On reaching the outer lateral ligament of the stifle it divides into the musculo-cutaneous nerve and the anterior tibial.

The Musculo - Cutaneous branch is situated beneath the tibial aponeurosis. It passes down the leg along the union of the peroneus and extensor pedis, and ultimately is distributed to the skin on the outer side of the metatarsus. In its course it gives branches to the peroneus.