7th Cranial nerve causes facial droop. Which nerve is it?

7th Cranial nerve causes facial droop. Which nerve is it?

• A. Fifth Cranial Nerve
• B. Seventh Cranial Nerve
• C. Ninth Cranial Nerve
• D. Tenth Cranial Nerve

Answer: (B)

Facial expression is controlled by the facial nerve, which is the seventh cranial nerve. When this nerve is affected, the muscles on one side of the face weaken or paralyze, causing a facial droop. The other options refer to nerves that do not primarily control facial muscles: the trigeminal nerve (fifth) handles face sensation and chewing muscles; the glossopharyngeal nerve (ninth) and the vagus nerve (tenth) govern swallowing, taste in parts of the tongue, and throat/voice functions. So the nerve responsible for a facial droop is the facial nerve, the seventh cranial nerve.

Facial expression is controlled by the facial nerve, which is the seventh cranial nerve. When this nerve is affected, the muscles on one side of the face weaken or paralyze, causing a facial droop. The other options refer to nerves that do not primarily control facial muscles: the trigeminal nerve (fifth) handles face sensation and chewing muscles; the glossopharyngeal nerve (ninth) and the vagus nerve (tenth) govern swallowing, taste in parts of the tongue, and throat/voice functions. So the nerve responsible for a facial droop is the facial nerve, the seventh cranial nerve.