What is the origin of the deep peroneal nerve?

The deep peroneal nerve originates as one of the terminal branches of the common peroneal nerve near the neck of the fibula, located under the peroneus longus muscle.

What muscles does the deep peroneal nerve innervate?

It innervates all four muscles of the anterior leg compartment, plus the extensor digitorum brevis on the foot dorsum and the first dorsal interosseous muscle of the sole.

What is the relationship between the deep peroneal nerve and the anterior tibial artery?

In the upper and lower thirds of the leg, the nerve lies lateral to the artery. In the middle third, it crosses anterior to the artery, a pattern called nervus hesitans.

What sensory area does the deep peroneal nerve supply?

It provides cutaneous innervation to the skin of the first interdigital cleft (adjacent sides of the great and second toes).

Where does the deep peroneal nerve terminate?

At the front of the ankle, it divides into medial and lateral terminal branches that supply muscles and skin on the foot.

What is the clinical significance of the deep peroneal nerve's course?

Its path through the anterior leg compartment means damage can cause foot drop (weakness in dorsiflexion) and sensory loss between the first two toes.

How does the deep peroneal nerve differ from the superficial peroneal nerve?

The deep peroneal nerve innervates anterior leg muscles and a small skin area, while the superficial peroneal nerve supplies lateral leg muscles and more extensive skin areas.

Deep Peroneal Nerve – Course & Motor Supply

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