Denker’s operation may result in injury to which nerve?
**Core Concept**
Denker's operation is a surgical procedure used to repair a perforated eardrum or a chronic suppurative otitis media. It involves the removal of the diseased middle ear mucosa and the repair of the eardrum.
**Why the Correct Answer is Right**
During Denker's operation, the surgeon must be careful not to damage the facial nerve, which is located in the middle ear and plays a crucial role in facial movements and expressions. The facial nerve runs close to the area where the diseased middle ear mucosa is removed, making it vulnerable to injury. The facial nerve is responsible for controlling the muscles of facial expression, and damage to this nerve can result in weakness or paralysis of the face.
**Why Each Wrong Option is Incorrect**
**Option A:** The chorda tympani nerve is another nerve that runs through the middle ear, but it is not the primary nerve that is at risk during Denker's operation.
**Option B:** The vagus nerve is a cranial nerve that has multiple branches, but it is not directly related to the surgical procedure of Denker's operation.
**Option C:** The glossopharyngeal nerve is a cranial nerve that is involved in swallowing and taste, but it is not the nerve that is most at risk during Denker's operation.
**Clinical Pearl / High-Yield Fact**
Denker's operation is a classic example of a surgical procedure that requires careful attention to the facial nerve to avoid injury and prevent facial weakness or paralysis.
**Correct Answer:** C. Facial nerve.