Tracy Packiam Alloway

Mastering the latest fitness craze—keeping your brain healthy at any age. Judging from the worldwide popularity of the brain game, Nintendo DS, and such mind-bending puzzles as SuDoku and KenKen®, keeping one's mind as limber as an Olympic athlete is an international obsession. With forecasters predicting over a million people with dementia by 2025, today's young and senior population have...