It is necessary for the person with a cochlear implant to have function in the auditory nerves. This is because without the nerve function, the implant will not work.
Your eyes are connected to your brain by optic nerves, not auditory nerves. Optic nerves transmit visual information from the eyes to the brain for processing, while auditory nerves transmit information related to hearing from the ears to the brain.
The eighth cranial nerve or the vestibulocochlear nerve is dedicated to auditory apparatus.
The auditory nerve carries auditory impulses to the brain.
Auditory nerves are first relayed to the thalamus on the way to the temporal lobes auditory cortex. The thalamus is the gray matter between the cerebral hemispheres.
The auditory nerve, also known as the vestibulocochlear nerve, carries messages of sound from the inner ear to the brainstem and then to the brain where sound is processed and interpreted.
The question is asking what three cranial nerves are purely sensory in their function. Some relevant terms here are olfactory, optic, and auditory or vestibucochlear or acoustic nerves. The only three cranial nerves that are pure sensory in function are cranial nerve #1 : the olfactory nerve (smell), cranial nerve #2 : the optic nerve (sight), and cranial nerve #8 : the auditory/vestibucochlear/acoustic nerve (hearing).
Links That Stimulates sensory nerves to motor nerves
ASSOCIATION NERVES links the sensory to the motor nerves
Sensation
Cochlear implants transmit the sound waves and deliver them to the part of the brain the makes the waves and vibrations into noises. A hearing aid is placed on the ear and transmits the sound into a device placed in the skull.
olfactory optic oculomotor trochlear trigeminal abducens facial auditory glossopharyngeal vagus
Nerves need sugar for energy, and to function properly.