Washington: Staying mentally active by reading books or writing letters helps protect the brain in old age, says a new American study.The study, published in Neurology, says performing mental challenges leads to slower cognitive decline. It adds weight to the idea that dementia onset can be delayed by lifestyle factors, BBC reported.In the study by the Rush University Medical Center in Chicago, 294 people over the age of 55 were given tests that measured memory and thinking, every year for about six years until their deaths.They also answered a questionnaire about whether they read books, wrote letters and took part in other activities linked to mental stimulation during childhood, adolescence, middle age, and in later life.
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