After parotidectomy patients complains of loss of sensation while shaving. Which nerve is most likely affected?
## **Core Concept**
The question tests knowledge of the nerves supplying the face, particularly those involved in sensory innervation. The **parotid gland** is located in the preauricular area, and surgical procedures in this region, such as parotidectomy, can potentially damage nearby nerves.
## **Why the Correct Answer is Right**
The correct answer, **the great auricular nerve**, provides sensory innervation to the skin over the parotid gland and the angle of the mandible. This area includes the region commonly shaved, making it a likely candidate for the nerve affected during a parotidectomy. The great auricular nerve arises from the cervical plexus (C2 and C3) and supplies the skin over the parotid gland, the mastoid area, and parts of the auricle.
## **Why Each Wrong Option is Incorrect**
- **Option A:** The **auriculotemporal nerve** does provide sensory innervation to the face but primarily to the temple, the TMJ, and parts of the auricle. While it could be involved in procedures near the parotid gland, it's less likely to cause issues with sensation while shaving.
- **Option B:** The **lingual nerve** provides sensation to the anterior two-thirds of the tongue and is at risk during procedures like parotidectomy or operations on the floor of the mouth. However, its sensory distribution doesn't typically involve the skin where shaving would occur.
- **Option D:** The **transverse cervical nerve** provides sensory innervation to the anterior neck region. Its distribution doesn't typically involve the area commonly shaved.
## **Clinical Pearl / High-Yield Fact**
A key point to remember is that the **great auricular nerve** can be at risk during surgical procedures in the parotid region, such as parotidectomy. Damage to this nerve can result in sensory deficits in its distribution area, which includes the skin overlying the parotid gland and the angle of the mandible.
## **Correct Answer:** . **great auricular nerve**