Cited by 437Functional Brain Connectivity StudiesNeural dynamics and brain functionAdvanced Neuroimaging Techniques and Applications

Undirected graphs of frequency-dependent functional connectivity in whole brain networks

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Salvador, Raymond, Suckling, John, Schwarzbauer, Christian, Bullmore, Ed·2005·Philosophical Transactions of the Royal Society B: Biological Sciences

Abstract

We explored properties of whole brain networks based on multivariate spectral analysis of human functional magnetic resonance imaging (fMRI) time-series measured in 90 cortical and subcortical subregions in each of five healthy volunteers studied in the (no-task) resting state. We note that undirected graphs representing conditional independence between multivariate time-series can be more readily approached in the frequency domain than the time domain. Estimators of partial coherency and normalized partial mutual information ϕ , an integrated measure of partial coherence over an arbitrary frequency band, are applied. Using these tools, we replicate the prior observations that bilaterally homologous brain regions tend to be strongly connected and functional connectivity is generally greater at low frequencies [0.0004, 0.1518 Hz]. We also show that long-distance intrahemispheric connections between regions of prefrontal and parietal cortex were more salient at low frequencies than at frequencies greater than 0.3 Hz, whereas many local or short-distance connections, such as those comprising segregated dorsal and ventral paths in posterior cortex, were also represented in the graph of high-frequency connectivity. We conclude that the partial coherency spectrum between a pair of human brain regional fMRI time-series depends on the anatomical distance between regions: long-distance (greater than 7 cm) edges represent conditional dependence between bilaterally symmetric neocortical regions, and between regions of prefrontal and parietal association cortex in the same hemisphere, are predominantly subtended by low-frequency components.

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Registry

Crossref · 10.1098/rstb.2005.1645

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Authors
Salvador, R., Suckling, J., Schwarzbauer, C., & Bullmore, E.
Affiliations
  • University of Cambridge (GB)
  • Brain Mapping Unit and Wolfson Brain Imaging Centre, Departments of Psychiatry and Clinical Neurosciences, Addenbrooke's Hospital, University of CambridgeCambridge CB2 2QQ, UK
  • MRC Cognition and Brain Sciences Unit (GB)
Venue
Philosophical Transactions of the Royal Society B: Biological Sciences
Published
2005-05-29
Volume
360
Issue
1457
Pages
937-946
ISSN
  • 0962-8436 (ISSN-L)
  • 1471-2970
OpenAlex
W2155525875
Cited by
437
References
3
Citations by year
2026: 3 · 2025: 6 · 2024: 8 · 2023: 11 · 2022: 12 · 2021: 22 · 2020: 19 · 2019: 18 · 2018: 32 · 2017: 26 · 2016: 32 · 2015: 28 · 2014: 21 · 2013: 32 · 2012: 33
FWCI
8.11
Type
journal article
Language
en
Open access
Locations
  • Philosophical Transactions of the Royal Society B Biological Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • Medical Research Council
  • National Institute of Mental Health
  • National Institute of Biomedical Imaging and Bioengineering
Topics
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Functional Brain Connectivity Studies
  • Life Sciences › Neuroscience › Cognitive Neuroscience › Neural dynamics and brain function
  • Health Sciences › Medicine › Radiology, Nuclear Medicine and Imaging › Advanced Neuroimaging Techniques and Applications
Keywords
functional connectivity, whole-brain networks, undirected graphs, partial coherence, resting-state fMRI, anatomical distance, long-distance connections, prefrontal cortex, parietal cortex, spectral analysis
MeSH terms
Brain, Brain Mapping, Humans, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Models, Neurological, Neural Pathways, Time Factors, Multivariate Analysis

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