Which cranial nerve is also known as the vestibulocochlear nerve?

Which cranial nerve is also known as the vestibulocochlear nerve?

• A. Glossopharyngeal IX
• B. Vagus X
• C. Hypoglossal XII
• D. Acoustic/Vestibulocochlear VIII

Answer: (D)

The key idea is recognizing which nerve handles hearing and balance. The vestibulocochlear nerve is the eighth cranial nerve and is dedicated to these special senses, transmitting sound information from the cochlea and balance information from the vestibular apparatus to the brain. It’s also been called the acoustic nerve in older terminology, which is exactly the second name in the option. That dual naming is why this choice fits best. The other nerves listed have different roles—glossopharyngeal for taste and swallowing, vagus for wide-ranging autonomic functions, and hypoglossal for tongue movement—so they don’t match the vestibulocochlear function.

The key idea is recognizing which nerve handles hearing and balance. The vestibulocochlear nerve is the eighth cranial nerve and is dedicated to these special senses, transmitting sound information from the cochlea and balance information from the vestibular apparatus to the brain. It’s also been called the acoustic nerve in older terminology, which is exactly the second name in the option. That dual naming is why this choice fits best. The other nerves listed have different roles—glossopharyngeal for taste and swallowing, vagus for wide-ranging autonomic functions, and hypoglossal for tongue movement—so they don’t match the vestibulocochlear function.