Cited by 150Dementia and Cognitive Impairment ResearchFunctional Brain Connectivity StudiesAlzheimer's disease research and treatments

Spatial patterns of atrophy, hypometabolism, and amyloid deposition in Alzheimer's disease correspond to dissociable functional brain networks: Network-Specificity of AD Pathology

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Grothe, Michel J., Teipel, Stefan J., for the Alzheimer's Disease Neuroimaging Initiative·2016·Human Brain Mapping

Abstract

Recent neuroimaging studies of Alzheimer's disease (AD) have emphasized topographical similarities between AD-related brain changes and a prominent cortical association network called the default-mode network (DMN). However, the specificity of distinct imaging abnormalities for the DMN compared to other intrinsic connectivity networks (ICNs) of the limbic and heteromodal association cortex has not yet been examined systematically. We assessed regional amyloid load using AV45-PET, neuronal metabolism using FDG-PET, and gray matter volume using structural MRI in 473 participants from the Alzheimer's Disease Neuroimaging Initiative, including preclinical, predementia, and clinically manifest AD stages. Complementary region-of-interest and voxel-based analyses were used to assess disease stage- and modality-specific changes within seven principle ICNs of the human brain as defined by a standardized functional connectivity atlas. Amyloid deposition in AD dementia showed a preference for the DMN, but high effect sizes were also observed for other neocortical ICNs, most notably the frontoparietal-control network. Atrophic changes were most specific for an anterior limbic network, followed by the DMN, whereas other neocortical networks were relatively spared. Hypometabolism appeared to be a mixture of both amyloid- and atrophy-related profiles. Similar patterns of modality-dependent network specificity were also observed in the predementia and, for amyloid deposition, in the preclinical stage. These quantitative data confirm a high vulnerability of the DMN for multimodal imaging abnormalities in AD. However, rather than being selective for the DMN, imaging abnormalities more generally affect higher order cognitive networks and, importantly, the vulnerability profiles of these networks markedly differ for distinct aspects of AD pathology.

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Authors
Grothe, M. J., Teipel, S. J., & Initiative, F. T. A. D. N.
Affiliations
German Center for Neurodegenerative Diseases (DE)
Venue
Human Brain Mapping
Publisher
Wiley
Published
2015-10-06
Volume
37
Issue
1
Pages
35-53
ISSN
1065-9471 (ISSN-L)
OpenAlex
W1913607034
Cited by
150
References
83
Citations by year
2026: 8 · 2025: 10 · 2024: 13 · 2023: 14 · 2022: 12 · 2021: 26 · 2020: 16 · 2019: 11 · 2018: 18 · 2017: 15 · 2016: 7
FWCI
10.81
Type
journal article
Language
en
Open access
Locations
  • Human Brain Mapping (publishedVersion)
  • Europe PMC (PubMed Central) (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • DZNE Pub (submittedVersion)
Funders
  • National Institutes of Health (U01 AG024904)
  • Department of Defense (W81XWH-12-2-0012.)
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
Alzheimer's disease, default mode network, resting-state networks, amyloid deposition, hypometabolism, gray matter atrophy, frontoparietal network, FDG-PET, preclinical Alzheimer's disease
MeSH terms
Aged, Aged, 80 and over, Alzheimer Disease, Amyloid, Atrophy, Brain, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Mental Status Schedule, Metabolic Diseases, Middle Aged, Models, Neurological, Neural Pathways, Radiopharmaceuticals, Fluorodeoxyglucose F18, Positron-Emission Tomography

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