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• W4377012928 abstract "Abstract The identification of a neurodegenerative disorder’s distributed pattern of atrophy—or atrophy ‘signature’—can lend insights into the cortical networks that degenerate in individuals with specific constellations of symptoms. In addition, this signature can be used as a biomarker to support early diagnoses and to potentially reveal pathological changes associated with said disorder. Here, we characterized the cortical atrophy signature of behavioural variant frontotemporal dementia (bvFTD). We used a data-driven approach to estimate cortical thickness using surface-based analyses in two independent, sporadic bvFTD samples (n = 30 and n = 71, total n = 101), using age- and gender-matched cognitively and behaviourally normal individuals. We found highly similar patterns of cortical atrophy across the two independent samples, supporting the reliability of our bvFTD signature. Next, we investigated whether our bvFTD signature targets specific large-scale cortical networks, as is the case for other neurodegenerative disorders. We specifically asked whether the bvFTD signature topographically overlaps with the salience network, as previous reports have suggested. We hypothesized that because phenotypic presentations of bvFTD are diverse, this would not be the case, and that the signature would cross canonical network boundaries. Consistent with our hypothesis, the bvFTD signature spanned rostral portions of multiple networks, including the default mode, limbic, frontoparietal control and salience networks. We then tested whether the signature comprised multiple anatomical subtypes, which themselves overlapped with specific networks. To explore this, we performed a hierarchical clustering analysis. This yielded three clusters, only one of which extensively overlapped with a canonical network (the limbic network). Taken together, these findings argue against the hypothesis that the salience network is preferentially affected in bvFTD, but rather suggest that—at least in patients who meet diagnostic criteria for the full-blown syndrome—neurodegeneration in bvFTD encompasses a distributed set of prefrontal, insular and anterior temporal nodes of multiple large-scale brain networks, in keeping with the phenotypic diversity of this disorder." @default.
• W4377012928 created "2023-05-19" @default.
• W4377012928 creator A5002178603 @default.
• W4377012928 creator A5002320221 @default.
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• W4377012928 date "2023-05-18" @default.
• W4377012928 modified "2023-10-13" @default.
• W4377012928 title "Atrophy in behavioural variant frontotemporal dementia spans multiple large-scale prefrontal and temporal networks" @default.
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• W4377012928 doi "https://doi.org/10.1093/brain/awad167" @default.
• W4377012928 hasPubMedId "https://pubmed.ncbi.nlm.nih.gov/37201288" @default.
• W4377012928 hasPublicationYear "2023" @default.
• W4377012928 type Work @default.
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• W4377012928 hasAuthorship W4377012928A5002178603 @default.
• W4377012928 hasAuthorship W4377012928A5002320221 @default.

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