Which nerve is responsible for hearing and balance?

• A. Facial (CN VII)
• B. Trigeminal (CN V)
• C. Vestibulocochlear (CN VIII)
• D. Vagus (X)

Answer: (C)

Hearing and balance are carried by the vestibulocochlear nerve, which has two components: the cochlear part for hearing and the vestibular part for balance and spatial orientation. It transmits sensory information from the inner ear (the cochlea for sound and the vestibular apparatus for equilibrium) to the brainstem via the internal acoustic canal, allowing you to hear sounds and maintain balance. The other nerves listed have different primary roles: the facial nerve mainly controls facial muscles and some taste, the trigeminal nerve provides facial sensation and motor to chewing muscles, and the vagus nerve handles parasympathetic functions and various visceral senses, not hearing or balance.