The following conditions bests describes the effects of damage to the cochlear branch of cranial nerve VIII - the person would have a limited range of detecting the frequency of sound (option - a) is correct answer.
Sound and knowledge of one's position and movement in space are transmitted to the brain via cranial nerve VIII. The vestibular and auditory systems perform a number of essential clinical and psychiatric functions.
The cochlear and vestibular nerves make up the vestibulocochlear nerve, also known as cranial nerve eight (CN VIII). Within the brainstem, each nerve has unique nuclei. While the cochlear nerve is in charge of hearing, the vestibular nerve is primarily in charge of maintaining body balance and eye movements.
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