A new study, being carried from more than 12 years now, has claimed that those elderly people, who think too hard and stress their minds, may actually end damaging their brains. Dementia can progress in a human body if a person uses too much of his or her brain in various work-outs.

This study has come up despite the fact that it had once been said that mental decline is reduced when a brain constantly solves crosswords, Sudoku puzzles, and other brain teasers. But now, it has been said that it is only for a short term that these exercises keeps one cognitively fit; but for the longer term, one can develop dementia with this, and the mental decline becomes rather swift.

“Our results suggest that the benefit of delaying the initial signs of cognitive decline may come at the cost of more rapid dementia progression later on...”, said Robert S. Wilson, PhD, a Senior Neuropsychologist at the Rush Alzheimer's Disease Center in Chicago and Author of the study.

Also, this mentally active life can pose a great threat to a human being if diagnosed with dementia, because the latter can then lead to more negative brain changes in the person with dementia, than in others.

Therefore, it has been now suggested that people must, instead of engaging in particular brain-teasers, shall become keen readers and should not stress their brains.