Alzheimer's does not necessarily reduce mental function

Interesting. In summary, this study shows that Alzheimer's isn't in itself a reason for decreased mental functions. Some people who remained mentally active by doing lots of things requiring mental skills, had normal cognitive skills even though autopsies showed that they had Alzheimer's.

Of course, just to put a mild damper on it, I'll point out that we don't *know* that the mental activity actually prevented harm. For all we know there's some other genetic difference which makes it possible for some people to work around the damage. But in the meantime. Keep mental exercising! (Mentaling?).