The latest fitness fad has an unusual goal: bulking up the three pounds of mush between your ears. Sales of “brain fitness” software increased from a few million dollars in 2005 to $80 million in 2007, according to an estimate from the consulting firm Sharpbrains. Plenty more products are available on the Web. Computerized cognitive training includes games that test memory, attention, and problem-solving skills, plus good old arithmetic and l » Read more: Which Brain Games Will Help Your Brain the Most?
