My Great-Uncle Terry is going to die in a few days. He has been very sick with Huntington's Disease for almost as long as I can remember and it is taking him now. They have stopped feeding him in the hospital. He has been sick for so, so long. Huntington's Disease is degenerative, and basically what it does is to affect the signals between your brain and the rest of your body. It can cause behavioural and personality changes, too. My Uncle Terry didn't suffer these, but he has been unable to walk or chew his food or speak for many, many years. My Grandfather, who also has it, has begun to exhibit his symptoms over the past few years and his personality has been affected.
I hope my Uncle Terry goes peacefully. He has suffered for so long. :(