Add Yahoo as a preferred source to see more of our stories on Google. Research shows that crossword puzzles are effective in improving memory. (Getty Images) (artisteer via Getty Images) There is no ...

Some 2.3 million U.S. adults over 65 — more than 4% — have a diagnosis of dementia. But even without a diagnosis, a certain amount of cognitive decline is normal as age sets in. Whether it’s due to ...