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• W2952320141 abstract "Despite subjective cognitive decline (SCD), a preclinical stage of Alzheimer’s disease (AD), being widely studied in recent years, studies on centrality frequency in individuals with SCD are lacking. This study aimed to investigate the differences in centrality frequency between individuals with SCD and normal controls (NCs). Forty individuals with SCD and fifty-three well-matched NCs underwent a resting-state functional magnetic resonance imaging scan. We assessed individual dynamic functional connectivity using sliding window correlations. In each time window, brain regions with a high degree centrality were defined as hubs. Across the entire time window, the proportion of time that the hub appeared was characterized as centrality frequency. The centrality frequency correlated with cognitive performance differently in individuals with SCD and NCs. Our results revealed that in individuals with SCD, compared with NCs, correlations between centrality frequency of the anterior cortical regions and cognitive performance decreased (79.2% for NCs and 43.5% for individuals with SCD). In contrast, correlations between centrality frequency of the posterior cortical regions and cognitive performance increased in SCD individuals compared with NCs (20.8% for NCs and 56.5% for individuals with SCD). Moreover, the changes mainly focused on the anterior (93.3% for NCs and45.5% for individuals with SCD) and posterior (6.7% for NCs and 54.5% for individuals with SCD) regions associated with the default mode network (DMN). In addition, we used absolute thresholds (correlation efficient r = 0.2, 0.25) and proportional thresholds (sparsity = 0.2, 0.25) to verify the results. Dynamic results are relative stable at absolute thresholds while static results are relative stable at proportional thresholds. Converging findings provide a new framework for the detection of the changes occurring in individuals with SCD via centrality frequency of the DMN." @default.
• W2952320141 created "2019-06-27" @default.
• W2952320141 creator A5006044740 @default.
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• W2952320141 date "2019-06-20" @default.
• W2952320141 modified "2023-10-17" @default.
• W2952320141 title "Changes in Centrality Frequency of the Default Mode Network in Individuals With Subjective Cognitive Decline" @default.
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• W2952320141 doi "https://doi.org/10.3389/fnagi.2019.00118" @default.
• W2952320141 hasPubMedCentralId "https://www.ncbi.nlm.nih.gov/pmc/articles/6595963" @default.
• W2952320141 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/31281248" @default.
• W2952320141 hasPublicationYear "2019" @default.
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