This is one disease that getting it scares me more than almost any other; yet once someone has it deep it no longer matters to them. I've always wondered if what you do with your mind during your life has any actual influence on this disease.
1. https://en.wikipedia.org/wiki/Alzheimer%27s_disease#Other_hy...
Unfortunately, I think it is more accurate to say they are not longer the same person.
http://www.helpguide.org/elder/alzheimers_prevention_slowing...