Which cranial nerve controls facial movements such as smiling and frowning and controls saliva?

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Multiple Choice

Which cranial nerve controls facial movements such as smiling and frowning and controls saliva?

Explanation:
Movements of the face and saliva production are controlled by the facial nerve. Its motor fibers go to the muscles of facial expression, enabling actions like smiling and frowning. It also carries parasympathetic fibers that stimulate the salivary glands (submandibular and sublingual) via the chorda tympani branch, providing saliva production. The other nerves don’t fit this combination: the trigeminal nerve mainly handles facial sensation and chewing, the vestibulocochlear nerve handles hearing and balance, and the olfactory nerve handles smell.

Movements of the face and saliva production are controlled by the facial nerve. Its motor fibers go to the muscles of facial expression, enabling actions like smiling and frowning. It also carries parasympathetic fibers that stimulate the salivary glands (submandibular and sublingual) via the chorda tympani branch, providing saliva production. The other nerves don’t fit this combination: the trigeminal nerve mainly handles facial sensation and chewing, the vestibulocochlear nerve handles hearing and balance, and the olfactory nerve handles smell.

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