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Knowledge skills- (Science and technology)

                   (Brain Damage by Smoking)
     Damage to the brain's outer layer caused by           Smoking may be reversible after quitting, but it
   Could take years, a research revealed.
Brain scans of 500 Scottish septuagenarians confirmed a link between smoking and an acceleration of age-related thinning of the cortex—the outer layer of grey matter, researchers reported. But they also pointed, for the first time, the potential for recovery
after quitting. The cortex of ex-smokes in the group "seems to have partially recovered for each year without smoking", the multinational research team wrote in the national journal molecular psychiatry. But, they warned that:" Although partially recovery seems possible, it can be along process." Many studies have linked cigarette smoking with cognitive decline and dementia, that smokers have, on average, slightly poorer global congitive functioning in later life, as well as lower mean scores on cognitive flexibility and memory".
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