**Question:** In fracture neck of fibula, the following nerve is involved

A. Tibial Nerve
B. Common Peroneal Nerve
C. Superficial Peroneal Nerve
D. Deep Peroneal Nerve

**Correct Answer:** D. Deep Peroneal Nerve

**Core Concept:**
The neck of the fibula is the narrow portion between the widest part of the fibula and the ankle joint. Fractures in this region can lead to injury to the nerves that traverse or pass near this area.

**Why the Correct Answer is Right:**
The Deep Peroneal Nerve is a crucial component of the fibula's neurovascular bundle. It is a branch of the Sciatic Nerve and plays a significant role in the motor function of the fibula. In the neck of the fibula, the Deep Peroneal Nerve provides motor innervation to the muscles that stabilize the ankle joint and flex the toes. When the fibula is fractured at the neck region, the injury to the nerve can occur due to the compression or stretching of the nerve, leading to its dysfunction.

**Why Each Wrong Option is Incorrect:**

A. Tibial Nerve: The Tibial Nerve is another important nerve in the lower limb but it does not pass through the neck of the fibula. It arises from the L4-S3 spinal segments and innervates the muscles of the leg, foot, and ankle.

B. Common Peroneal Nerve: The Common Peroneal Nerve is incorrect as it is part of the Sciatic Nerve, not the Deep Peroneal Nerve. The Common Peroneal Nerve supplies motor function to the extensor muscles of the foot and ankle, but it does not pass through the neck of the fibula.

C. Superficial Peroneal Nerve: The Superficial Peroneal Nerve is another important nerve in the lower limb but it also does not pass through the neck of the fibula. It arises from the L4-S3 spinal segments and provides sensory innervation to the skin of the dorsum of the foot and ankle.

**Clinical Pearl:**
In cases of suspected Deep Peroneal Nerve injury, it is crucial to evaluate the patient's motor function and sensation of the dorsum of the foot and ankle. Assessing these symptoms will help diagnose the injury accurately and guide further management.

**Why the Correct Answer is Right:**
The Deep Peroneal Nerve is responsible for the motor function of the dorsiflexion of the ankle and eversion of the foot. Injuries to the Deep Peroneal Nerve can lead to weakness or paralysis of these muscles, causing decreased dorsiflexion and eversion of the ankle and foot, respectively. This can be associated with a sensory deficit in the dorsum of the foot.

**Why Each Wrong Option is Incorrect:**

A. Tibial Nerve: The Tibial Nerve provides motor function to the muscles of the leg and foot but does not pass through the neck of the fibula. Therefore, it is incorrect in this context.

B. Common Peroneal Nerve: The Common Per