Cited by 102Dementia and Cognitive Impairment ResearchFunctional Brain Connectivity StudiesAlzheimer's disease research and treatments

The DOI matches its Crossref record; 42 of the 42 references it cites were found in a registry or an index.

Altered deactivation in individuals with genetic risk for Alzheimer's disease

Abstract

Regions that show task-induced deactivations may be part of a default-mode network related to processes that are more engaged during passive than active task conditions. Alteration of task-induced deactivations with age and dementia is indicated by atypical engagement of default-mode network regions. Genetic studies show a relation between the apolipoprotein E4 (APOE4) allele and the common form of Alzheimer's disease (AD), and altered functional brain activation has been observed in non-demented APOE4 carriers compared to non-carriers. Here we investigate the hypothesis of altered default-mode network brain responses in individuals with genetic risk for AD. Functional MRI was used to assess task-induced deactivation in 60 subjects of which 30 carried at least one copy of the APOE4 allele, and 30 non-carriers. Subjects were scanned while performing a semantic categorization task shown to promote episodic memory encoding. The results show patterns of deactivation consistent with the default-mode network. We also found reduced deactivation in non-demented APOE4 carriers compared to non-carriers, suggesting alterations in the default-mode network in the absence of dementia. These results implicate possibilities for investigating altered properties of task-induced deactivations in individuals with genetic risk for AD, and may prove useful for pre-clinical identification of individuals susceptible to memory problems and AD.

Overview

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Crossref · 10.1016/j.neuropsychologia.2008.01.026

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Metadata

Authors
Persson, J., Lind, J., Larsson, A., Ingvar, M., Sleegers, K., Van Broeckhoven, C., Adolfsson, R., Nilsson, L.-G., & Nyberg, L.
Affiliations
  • Stockholm University (SE)
  • Karolinska University Hospital (SE)
  • Umeå University (SE)
  • University of Antwerp (BE)
Corresponding author
Persson, J.
Venue
Neuropsychologia
Publisher
Elsevier BV
Published
2008-05
Volume
46
Issue
6
Pages
1679-1687
ISSN
0028-3932 (ISSN-L)
OpenAlex
W2140074909
Cited by
102
References
42
Citations by year
2026: 2 · 2025: 2 · 2024: 1 · 2023: 3 · 2022: 3 · 2021: 7 · 2020: 2 · 2019: 3 · 2018: 4 · 2017: 4 · 2016: 6 · 2015: 4 · 2014: 10 · 2013: 6 · 2012: 7
FWCI
8.88
Type
journal article
Language
en
Open access
closed
Locations
  • Neuropsychologia (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cellular and Molecular Neuroscience › Alzheimer's disease research and treatments
Keywords
Alzheimer's disease, APOE ε4, default mode network, task-induced deactivation, genetic risk, semantic classification, episodic memory encoding, preclinical Alzheimer's disease, functional brain activation
MeSH terms
Aged, Alzheimer Disease, Brain, Brain Mapping, Female, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Male, Memory, Middle Aged, Neuropsychological Tests, Oxygen, Semantics, Apolipoprotein E4

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