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Probably also keeps the risk of Alzheimer's down - mental stimulation is believed to have that effect.

http://www.helpguide.org/elder/alzheimers_prevention_slowing...




Sounds right, yes. Most elderly people I've met who still were mentally fit have been using their heads their entire life. Obviously this is anecdotal but I think it's just like a workout for your brain in order to keep in shape, just as being physically active keeps your body fit.




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