I also want to tell you that a neighbor here told me a story about one of her old college professors, obviously a bright man! One day as an adult he went in for an MRI or some scan for some reason, nothing serious, to find out that he only had ONE HEMISPHERE of his brain! He teased his students about it, saying things like "If I can do it with HALF a brain," etc.
I had never heard of this before, but I have studied brain physiology a little and I know how plastic the different functions can be -- a completely different place can take over for a lost function from another place, say after an injury.
I will keep praying for J.D. Double miracles are possible with G-d.