Dementia, known in the past as senility, is more than just a disease of the brain.
"It causes a gradual deterioration of not only the mind but the body as well," Mitchell said.
"The body gets weaker and weaker.
Just like in cancer or AIDS, for example, people may ultimately have a pneumonia at the end."

And Alzheimer's must be about the same too..
A gradual deterioration of the body..