Which cranial nerve provides the main motor supply to the muscles of facial expression?
a.Vagus nerve (CN X)
b.Optic nerve (CN II)
c.Trigeminal nerve (CN V)
d.Facial nerve (CN VII)
Explanation
The facial nerve (cranial nerve VII) controls the muscles of facial expression. The trigeminal nerve (CN V) is mainly sensory for the face and motor only to the chewing muscles. Estheticians should know this when performing facial massage.
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