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- W2095642798 abstract "Normal aging is associated with cognitive decline. Functions such as attention, information processing, and working memory are compromised. It has been hypothesized that not only regional changes, but also alterations in the integration of regional brain activity (functional brain connectivity) underlie the observed age-related deficits. Here, we examined the functional properties of brain networks based on spontaneous fluctuations within brain systems using functional magnetic resonance imaging. We hypothesized that functional connectivity of intrinsic brain activity in the “default-mode” network (DMN) is affected by normal aging and that this relates to cognitive function. Ten younger and 22 older subjects were scanned at “rest,” that is, lying awake with eyes closed. Our results show decreased activity in older versus younger subjects in 2 resting-state networks (RSNs) resembling the previously described DMN, containing the superior and middle frontal gyrus, posterior cingulate, middle temporal gyrus, and the superior parietal region. These results remain significant after correction for RSN-specific gray matter volume. The relevance of these findings is illustrated by the correlation between reduced activity of one of these RSNs and less effective executive functioning/processing speed in the older group." @default.
- W2095642798 created "2016-06-24" @default.
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- W2095642798 date "2007-12-05" @default.
- W2095642798 modified "2023-10-12" @default.
- W2095642798 title "Reduced resting-state brain activity in the “default network” in normal aging" @default.
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- W2095642798 doi "https://doi.org/10.1093/cercor/bhm207" @default.
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