Which of the following clinical features is not seen in Bell’s palsy?

 # Which of the following clinical features is not seen in Bell’s palsy?

A. Lacrimation

B. Xerostomia

C. Drooling of saliva

D. Sensory loss over affected side

The correct answer is D. Sensory loss over affected side.

Bell’s palsy primarily affects the motor function of the facial nerve (cranial nerve VII), leading to muscle weakness or paralysis on one side of the face. Sensory loss is typically not a feature of Bell’s palsy, as the facial nerve is primarily motor, with only a small contribution to sensory function (taste sensation on the anterior two-thirds of the tongue). Sensory loss over the face would more likely be associated with trigeminal nerve issues (cranial nerve V).

Here’s a breakdown of the other options:

Lacrimation (A): The facial nerve affects the lacrimal gland, and changes in tearing can occur in Bell's palsy.

Xerostomia (B): The facial nerve also has parasympathetic fibers that innervate salivary glands, so dry mouth (xerostomia) can be a symptom.

Drooling of saliva (C): Muscle weakness can lead to drooling due to poor control of the facial muscles.