Cited by 60Functional Brain Connectivity StudiesDementia and Cognitive Impairment ResearchNeural dynamics and brain function

Reorganisation of brain networks in frontotemporal dementia and progressive supranuclear palsy

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Hughes, Laura E., Ghosh, Boyd C.P., Rowe, James B.·2013·NeuroImage: Clinical

Abstract

The disruption of large-scale brain networks is increasingly recognised as a consequence of neurodegenerative dementias. We assessed adults with behavioural variant frontotemporal dementia and progressive supranuclear palsy using magnetoencephalography during an auditory oddball paradigm. Network connectivity among bilateral temporal, frontal and parietal sources was examined using dynamic causal modelling. We found evidence for a systematic change in effective connectivity in both diseases. Compared with healthy subjects, who had focal modulation of intrahemispheric frontal-temporal connections, the patient groups showed abnormally extensive and inefficient networks. The changes in connectivity were accompanied by impaired responses of the auditory cortex to unexpected deviant tones (MMNm), despite normal responses to standard stimuli. Together, these results suggest that neurodegeneration in two distinct clinical syndromes with overlapping profiles of prefrontal atrophy, causes a similar pattern of reorganisation of large-scale networks. We discuss this network reorganisation in the context of other focal brain disorders and the specific vulnerability of functional brain networks to neurodegenerative disease.

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Authors
Hughes, L. E., Ghosh, B. C. P., & Rowe, J. B.
Affiliations
MRC Cognition and Brain Sciences Unit (GB)
Corresponding author
Hughes, Laura E.
Venue
NeuroImage: Clinical
Publisher
Elsevier BV
Published
2013
Volume
2
Pages
459-468
ISSN
2213-1582 (ISSN-L)
OpenAlex
W1967807254
Cited by
60
References
114
Citations by year
2026: 1 · 2025: 3 · 2024: 2 · 2023: 1 · 2022: 6 · 2021: 8 · 2020: 5 · 2019: 16 · 2018: 4 · 2017: 4 · 2016: 1 · 2015: 3 · 2014: 4 · 2013: 2
FWCI
1.83
Type
journal article
Language
en
Open access
Locations
  • NeuroImage Clinical (publishedVersion, cc-by)
  • Europe PMC (PubMed Central) (publishedVersion, cc-by)
  • PubMed Central (publishedVersion, cc-by)
  • PubMed (publishedVersion)
  • Apollo (University of Cambridge) (submittedVersion, cc-by)
  • Apollo (cc-by)
Funders
  • Wellcome Trust (088324)
  • Medical Research Council (G0700503)
  • Guarantors of Brain
  • Raymond and Beverley Sackler Trust
  • Medical Research Council's Cognition and Brain Sciences Unit
  • NIHR Cambridge Comprehensive Biomedical Research Centre
  • Cambridge Brain Bank
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Health Sciences › Medicine › Psychiatry and Mental health › Dementia and Cognitive Impairment Research
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
Keywords
behavioral variant frontotemporal dementia, progressive supranuclear palsy, large-scale brain networks, effective connectivity, auditory oddball paradigm, mismatch negativity, neurodegeneration, dynamic causal modeling

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