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Cited by 376

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Functional connectivity and graph theory in preclinical Alzheimer's disease

Open access
Brier, Matthew R., Thomas, Jewell B., Fagan, Anne M., Hassenstab, Jason, Holtzman, David M., Benzinger, Tammie L., Morris, John C., Ances, Beau M.·2014·Neurobiology of Aging

Abstract

Alzheimer’s disease (AD) has a long preclinical phase in which amyloid and tau cerebral pathology accumulate without producing cognitive symptoms. Resting state functional connectivity MRI (rs-fcMRI) has demonstrated that brain networks degrade during symptomatic AD. It is unclear to what extent these degradations exist prior to symptomatic onset. In this study, we investigated graph theory metrics of functional integration (path length), functional segregation (clustering coefficient), and functional distinctness (modularity) as a function of disease severity. Further, we assessed whether these graph metrics were affected in cognitively normal participants with cerebrospinal fluid evidence of preclinical AD. Clustering coefficient and modularity, but not path length, were reduced in AD. Cognitively normal participants who harbored AD biomarker pathology also showed reduced values in these graph measures, demonstrating brain changes similar to, but smaller than, symptomatic AD. Only modularity was significantly affected by age. We also demonstrate that AD has a particular effect on hub-like regions in the brain. We conclude that AD causes large-scale disconnection that is present before onset of symptoms.

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Crossref · 10.1016/j.neurobiolaging.2013.10.081

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Metadata

Authors
Brier, M. R., Thomas, J. B., Fagan, A. M., Hassenstab, J., Holtzman, D. M., Benzinger, T. L., Morris, J. C., & Ances, B. M.
Venue
Neurobiology of Aging
Publisher
Elsevier BV
Published
2014-04
Volume
35
Issue
4
Pages
757-768
ISSN
0197-4580 (ISSN-L)
OpenAlex
W2000363330
Cited by
376
References
23
FWCI
10.94
Type
journal article
Language
en
Open access
green

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CoChat. (2026). Citation check: Functional connectivity and graph theory in preclinical Alzheimer's disease. https://app.cochat.ai/papers/10.1016/j.neurobiolaging.2013.10.081
The paper
Brier, M. R., Thomas, J. B., Fagan, A. M., Hassenstab, J., Holtzman, D. M., Benzinger, T. L., Morris, J. C., & Ances, B. M. (2014). Functional connectivity and graph theory in preclinical Alzheimer's disease. Neurobiology of Aging. https://doi.org/10.1016/j.neurobiolaging.2013.10.081

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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).

Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.