Which function is associated with Cranial Nerve VIII (Vestibulocochlear)?

Which function is associated with Cranial Nerve VIII (Vestibulocochlear)?

• A. Hearing and balance
• B. Throat sensation, taste, swallowing
• C. Swallowing, parasympathetic supply
• D. Neck movement

Answer: (A)

Cranial Nerve VIII is tied to hearing and balance. It has two components—the cochlear portion that carries hearing information from the inner ear and the vestibular portion that carries information about head position and motion to help you maintain balance and stabilize your gaze. This nerve is mainly sensory, sending afferent signals rather than motor commands. The other described functions—throat sensation, taste, and swallowing; swallowing with parasympathetic supply; and neck movement—are associated with other nerves (glossopharyngeal and vagus for throat-related functions, and spinal accessory for neck movement). So the function most characteristic of Cranial Nerve VIII is hearing and balance.

Cranial Nerve VIII is tied to hearing and balance. It has two components—the cochlear portion that carries hearing information from the inner ear and the vestibular portion that carries information about head position and motion to help you maintain balance and stabilize your gaze. This nerve is mainly sensory, sending afferent signals rather than motor commands. The other described functions—throat sensation, taste, and swallowing; swallowing with parasympathetic supply; and neck movement—are associated with other nerves (glossopharyngeal and vagus for throat-related functions, and spinal accessory for neck movement). So the function most characteristic of Cranial Nerve VIII is hearing and balance.