Question:
Bell's palsy is associated with the lesion in which of the nerve?
Bell's palsy is associated with the lesion in which of the nerve?
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Which cranial nerve controls the muscles of facial expression?
Updated On: Jun 23, 2026
- 11th cranial nerve
- 7th cranial nerve
- 9th cranial nerve
- 3rd cranial nerve
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The Correct Option is B
Solution and Explanation
Step 1: Bell's palsy is an acute, idiopathic, lower motor neuron paralysis of the facial nerve.
Step 2: The facial nerve is the 7th cranial nerve (VII). It supplies the muscles of facial expression, so its malfunction causes inability to control movement on the affected side of the face.
Step 3: Therefore the lesion is in the 7th cranial nerve. The 11th (accessory), 9th (glossopharyngeal) and 3rd (oculomotor) nerves do not supply facial expression muscles, so they are wrong.
Step 2: The facial nerve is the 7th cranial nerve (VII). It supplies the muscles of facial expression, so its malfunction causes inability to control movement on the affected side of the face.
Step 3: Therefore the lesion is in the 7th cranial nerve. The 11th (accessory), 9th (glossopharyngeal) and 3rd (oculomotor) nerves do not supply facial expression muscles, so they are wrong.
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