What do cochlear implants utilize to assist in hearing?

Cochlear implants utilize surgically implanted electrodes in the cochlea to assist individuals with hearing loss. This technology works by bypassing damaged hair cells in the inner ear and directly stimulating the auditory nerve. When sound is picked up by an external microphone, it is converted into electrical signals that are sent to the electrodes implanted within the cochlea. These electrodes then stimulate the auditory nerve, allowing the brain to perceive sound.

This method differs significantly from hearing aids, which amplify sound. Hearing aids are beneficial for individuals with residual hearing but do not provide direct stimulation to the auditory nerve as cochlear implants do. The surgical implantation aspect of cochlear implants is essential because it allows for the precise delivery of electrical impulses, which cannot be achieved through non-invasive means. Therefore, the correct answer focuses on the unique and crucial functionality of the cochlear implant system.