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Cognitive 'fog' of normal aging linked to brain system disruption

Comparisons of the brains of young and old people have revealed that normal aging may cause cognitive decline due to deterioration of the connections among large-scale brain systems. The researchers linked the deterioration to a decrease in the integrity of the brain's "white matter," the tissue containing nerve cells that carry information. The researchers found that the disruption occurred even in the absence of pathology associated with Alzheimer's disease.

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Keywords: cognitive, fog, normal, aging, linked, brain, system, disruption

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