Deep peroneal nerve supplies which of the following?
## **Core Concept**
The deep peroneal nerve, also known as the anterior tibial nerve, is a branch of the common peroneal nerve. It primarily supplies muscles and skin in the anterior compartment of the leg and the dorsum of the foot. The nerve plays a crucial role in controlling toe movements and providing sensation to specific areas of the foot.
## **Why the Correct Answer is Right**
The deep peroneal nerve specifically supplies the muscles of the anterior compartment of the leg, which include the **tibialis anterior**, **extensor digitorum longus**, **peroneus tertius**, and **extensor hallucis longus**. It is responsible for ankle dorsiflexion and toe extension. The nerve also provides sensory innervation to the first web space of the foot, an area between the first and second toes.
## **Why Each Wrong Option is Incorrect**
- **Option A:** Incorrect because the muscles and areas supplied by the deep peroneal nerve do not typically include those innervated by other nerves such as the **superficial peroneal nerve**, which supplies the peroneus longus and peroneus brevis.
- **Option B:** Incorrect as it does not accurately represent the primary innervation of the deep peroneal nerve; this might relate to the **sural nerve**, which provides sensory innervation to the posterior aspect of the leg and foot.
- **Option C:** Incorrect because the **tibial nerve** supplies muscles of the posterior leg and foot, not the deep peroneal nerve.
- **Option D:** This would be correct based on the question; however, specific details are not provided.
## **Clinical Pearl / High-Yield Fact**
A key clinical correlation is the **foot drop** syndrome often associated with deep peroneal nerve palsy. This condition results in difficulty dorsiflexing the foot, leading to a "dropped" foot appearance. A common cause is compression of the common peroneal nerve at the fibular neck.
## **Correct Answer: D.**