Kucikova, L. orcid.org/0000-0002-0769-9542, Kalabizadeh, H., Motsi, K.G. et al. (4 more authors) (2024) A systematic literature review of fMRI and EEG resting-state functional connectivity in Dementia with Lewy Bodies: underlying mechanisms, clinical manifestation, and methodological considerations. Ageing Research Reviews, 93. 102159. ISSN 1568-1637
Abstract
Previous studies suggest that there may be important links between functional connectivity, disease mechanisms underpinning the Dementia with Lewy Body (DLB) and the key clinical symptoms, but the exact relationship remains unclear. We performed a systematic literature review to address this gap by summarising the research findings while critically considering the impact of methodological differences on findings. The main methodological choices of fMRI articles included data-driven, seed-based or regions of interest approaches, or their combinations. Most studies focused on examining large-scale resting-state networks, which revealed a consistent decrease in connectivity and some associations with non-cognitive symptoms. Although the inter-network connectivity showed mixed results, the main finding is consistent with theories positing disconnection between visual and attentional areas of the brain implicated in the aetiology of psychotic symptoms in the DLB. The primary methodological choice of EEG studies was implementing the phase lag index and using graph theory. The EEG studies revealed a consistent decrease in connectivity on alpha and beta frequency bands. While the overall trend of findings showed decreased connectivity, more subtle changes in the directionality of connectivity were observed when using a hypothesis-driven approach. Problems with cognition were also linked with greater functional connectivity disturbances. In summary, connectivity measures can capture brain disturbances in the DLB and remain crucial in uncovering the causal relationship between the networks’ disorganisation and underlying mechanisms resulting in psychotic, motor, and cognitive symptoms of the DLB.
Metadata
Item Type: | Article |
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Authors/Creators: |
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Copyright, Publisher and Additional Information: | © 2023 The Authors. Except as otherwise noted, this author-accepted version of a journal article published in Ageing Research Reviews is made available via the University of Sheffield Research Publications and Copyright Policy under the terms of the Creative Commons Attribution 4.0 International License (CC-BY 4.0), which permits unrestricted use, distribution and reproduction in any medium, provided the original work is properly cited. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/ |
Keywords: | Dementia with Lewy Body; EEG; Functional connectivity; Imaging methodology; MRI; Resting-state networks; Humans; Lewy Body Disease; Magnetic Resonance Imaging; Brain; Cognition; Electroencephalography; Alzheimer Disease |
Dates: |
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Institution: | The University of Sheffield |
Academic Units: | The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > Department of Neuroscience (Sheffield) The University of Sheffield > Faculty of Medicine, Dentistry and Health (Sheffield) > School of Medicine and Population Health |
Funding Information: | Funder Grant number Alzheimer’s Research UK ARUK-SRF2017B-1 |
Depositing User: | Symplectic Sheffield |
Date Deposited: | 12 Jun 2024 07:59 |
Last Modified: | 12 Jun 2024 08:00 |
Status: | Published |
Publisher: | Elsevier BV |
Refereed: | Yes |
Identification Number: | 10.1016/j.arr.2023.102159 |
Related URLs: | |
Open Archives Initiative ID (OAI ID): | oai:eprints.whiterose.ac.uk:213330 |