CNN CNN Newsroom June 20, 2013 13:50:00
>> that just brings tears to your eyes. so tell us, the implant that was given to grayson, how exactly does it work? >> so this is -- it is an amazing story, carol, i'm sorry. this is a brain stem implant, so typically what you think of with hearing, you have nerves that go from your ear, basically, to your brain stem. that's what grayson doesn't have. so he has a little microphone outside that captures sounds and puts it in all these frequencies, and then takes it directly to the brain stem, this area over here to an area called the cochlear nucleus. you don't really need to remember that. ju...