Cited by 723Dementia and Cognitive Impairment ResearchFunctional Brain Connectivity StudiesAlzheimer's disease research and treatments

A network diffusion model of disease progression in dementia

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Raj, Ashish, Kuceyeski, Amy, Weiner, Michael·2012·Neuron

Abstract

Patterns of dementia are known to fall into dissociated but dispersed brain networks, suggesting that the disease is transmitted along neuronal pathways rather than by proximity. This view is supported by neuropathological evidence for "prion-like" transsynaptic transmission of disease agents like misfolded tau and beta amyloid. We mathematically model this transmission by a diffusive mechanism mediated by the brain's connectivity network obtained from tractography of 14 healthy-brain MRIs. Subsequent graph theoretic analysis provides a fully quantitative, testable, predictive model of dementia. Specifically, we predict spatially distinct "persistent modes," which, we found, recapitulate known patterns of dementia and match recent reports of selectively vulnerable dissociated brain networks. Model predictions also closely match T1-weighted MRI volumetrics of 18 Alzheimer's and 18 frontotemporal dementia subjects. Prevalence rates predicted by the model strongly agree with published data. This work has many important implications, including dimensionality reduction, differential diagnosis, and especially prediction of future atrophy using baseline MRI morphometrics.

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Crossref · 10.1016/j.neuron.2011.12.040

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  • There is post-mortem evidence in AD for regional spread of tau pathology, and more recent neuroimaging studies in human AD suggest epicentres or nodes that may link to network dysfunction.

    “There is post-mortem evidence in AD for this regional spread (Zhou Gennatas et al., 2012) and more recent neuroimaging studies in human AD suggest “epicentres” (Zhou et al., 2012) or “nodes” (Raj et al., 2012) that may link to network dysfunction.”

    From In vivo imaging of tau pathology using multi-parametric quantitative MRI (2015) · cites this paper as Raj et al., 2012

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Authors
Raj, A., Kuceyeski, A., & Weiner, M.
Affiliations
  • Cornell University (US)
  • San Francisco VA Medical Center (US)
Corresponding author
Raj, Ashish
Venue
Neuron
Publisher
Elsevier BV
Published
2012-03
Volume
73
Issue
6
Pages
1204-1215
ISSN
0896-6273 (ISSN-L)
OpenAlex
W2089691915
Cited by
723
References
9
Citations by year
2026: 62 · 2025: 54 · 2024: 39 · 2023: 39 · 2022: 50 · 2021: 55 · 2020: 63 · 2019: 61 · 2018: 55 · 2017: 42 · 2016: 46 · 2015: 52 · 2014: 37 · 2013: 44 · 2012: 22
FWCI
35.41
Type
journal article
Language
en
Open access
Locations
  • Neuron (publishedVersion)
  • PubMed (publishedVersion)
  • Europe PMC (PubMed Central) (acceptedVersion)
  • PubMed Central (acceptedVersion)
  • eScholarship (California Digital Library) (submittedVersion)
Funders
  • National Institutes of Health (1f32eb012404-01)
  • National Institute of Neurological Disorders and Stroke (R01NS075425)
  • National Institute of Biomedical Imaging and Bioengineering (R21EB008138, F32 EB012404)
  • National Center for Research Resources (P41RR023953)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Physiology › Alzheimer's disease research and treatments
Keywords
dementia, Alzheimer's disease, frontotemporal dementia, disease progression, network diffusion model, prion-like propagation, amyloid-beta, brain connectivity networks, tractography, graph theory, persistent mode, differential diagnosis
MeSH terms
Adolescent, Adult, Age Factors, Aged, Alzheimer Disease, Atrophy, Biophysics, Brain, Brain Mapping, Dementia, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Middle Aged, Models, Neurological, Neural Pathways, Predictive Value of Tests, Psychiatric Status Rating Scales, ROC Curve, Statistics as Topic, Reproducibility of Results, Case-Control Studies, Disease Progression, Young Adult, Frontotemporal Dementia

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