it is a sergical implant put into the skull/head/brain

it is made out of plastic and the rod to the brain is metal/plastic

Neurosurgeons sometimes cureepilepsy by surgically removing scars from the brain. Sometimes they implant a device like a pacemaker in the brain. Sometimes neurologists treat epilepsy with medicine.

There is no "cure" for deafness. There are ways for a deaf person to hear again though. There is now a Cochlear Implant which is a surgery performed that relays sound from the mic on the implant directly to the brain rather than going through the damaged cochlea.

There is no "cure" for deafness. There are ways for a deaf person to hear again though. There is now a Cochlear Implant which is a surgery performed that relays sound from the mic on the implant directly to the brain rather than going through the damaged cochlea.