Studies of aging and of those who get Alzheimer's disease have shown that mental activity keeps the brain healthy. According to an Associated Press article written by Lauran Neergaard, it helps to read, do crossword puzzles, play chess or Scrabble, to learn a foreign language or a new hobby.
Case Western scientists studied 550 people and found those less mentally and physically active in middle age were three times more likely to get Alzheimer's as they grayed. Past studies have shown that the risk of Alzheimer's is inversely related to the amount of education, formal or otherwise.
Physical exercise is important also, because it improves blood flow to the brain.
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