Which cranial nerve is implicated in Bell's palsy?

Which cranial nerve is implicated in Bell's palsy?

• A. Vagus nerve
• B. Seventh Cranial Nerve
• C. Second Cranial Nerve
• D. Trigeminal nerve

Answer: (B)

Bell's palsy occurs when the nerve that controls the muscles of facial expression is affected. That nerve is the facial nerve, which supplies the muscles on the face and carries some taste and autonomic fibers as well. When it is inflamed or compressed, one side of the face becomes weak or paralyzed, producing the characteristic facial droop seen in Bell’s palsy. The other nerves listed don’t control facial muscles: the vagus nerve affects the voice and palate, the optic nerve handles vision, and the trigeminal nerve is mainly responsible for facial sensation and chewing.

Bell's palsy occurs when the nerve that controls the muscles of facial expression is affected. That nerve is the facial nerve, which supplies the muscles on the face and carries some taste and autonomic fibers as well. When it is inflamed or compressed, one side of the face becomes weak or paralyzed, producing the characteristic facial droop seen in Bell’s palsy. The other nerves listed don’t control facial muscles: the vagus nerve affects the voice and palate, the optic nerve handles vision, and the trigeminal nerve is mainly responsible for facial sensation and chewing.