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Memory loss can begin from age 45, scientists say
By Sarah Boseley
As all those of \middle age who have ever fumbled for a name to fit a face will believe, the brain begins to lose sharpness of memory and powers of reasoning and understanding not from 60 as previously thought, but from as early as 45, scientists say.
Their evidence comes from a large study of more than 7,000 civil servants aged between 45 and 70. The 5,000 men and 2,000 women agreed to undergo verbal and written tests on three occasions over a 10-year period for what is called the Whitehall II study.
A deterioration ∈ the memory and thinking powers of the oldest volunteers might be expected, but ∈ fact the researchers, led by Archana Singh-Manoux from the Centre for Research ∈Epidemiology and Population Health ∈France and University College London ∈ the UK, found that the brains of even the youngest were already on the slide. Over the decade, there was a 3.6% decline ∈ the mental reasoning of men and of women aged 45 to 49. The process appeared to have speeded up ∈ the older age groups. Men aged 65 to 70 have a decline of 9.6% while women fared a little better, at 7.4%.
It matters, say the scientists, because those whose brains appear to deteriorate fastest may be more likely to develop dementia ∈ later life – and because if there is any chance of slowing tha process, those at highest risk may need to be detected and treated at an early stage, before Alzheimer's or another form of dementia becomes apparent.
Fonte: http://www.guardian.co.uk (Texto adaptado)
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