Cited by 753Functional Brain Connectivity StudiesNeural dynamics and brain functionAdvanced Neuroimaging Techniques and Applications

Time-resolved resting-state brain networks

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Zalesky, Andrew, Fornito, Alex, Cocchi, Luca, Gollo, Leonardo L., Breakspear, Michael·2014·Proceedings of the National Academy of Sciences

Abstract

Neuronal dynamics display a complex spatiotemporal structure involving the precise, context-dependent coordination of activation patterns across a large number of spatially distributed regions. Functional magnetic resonance imaging (fMRI) has played a central role in demonstrating the nontrivial spatial and topological structure of these interactions, but thus far has been limited in its capacity to study their temporal evolution. Here, using high-resolution resting-state fMRI data obtained from the Human Connectome Project, we mapped time-resolved functional connectivity across the entire brain at a subsecond resolution with the aim of understanding how nonstationary fluctuations in pairwise interactions between regions relate to large-scale topological properties of the human brain. We report evidence for a consistent set of functional connections that show pronounced fluctuations in their strength over time. The most dynamic connections are intermodular, linking elements from topologically separable subsystems, and localize to known hubs of default mode and fronto-parietal systems. We found that spatially distributed regions spontaneously increased, for brief intervals, the efficiency with which they can transfer information, producing temporary, globally efficient network states. Our findings suggest that brain dynamics give rise to variations in complex network properties over time, possibly achieving a balance between efficient information-processing and metabolic expenditure.

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Crossref · 10.1073/pnas.1400181111

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  • Previous fMRI studies show global brain signals transition between high and low connectivity strength over time and these fluctuations relate to coordinated network topology patterns.

    “recent experiments using functional MRI data have demonstrated that global brain signals transition between states of high and low connectivity strength over time (Zalesky et al., 2014) and that these fluctuations are related to coordinated patterns of network topology (Betzel et al., 2015)”
  • A VAR model order of 11 appropriately mimics the expected temporal signature of the BOLD response in 0.72-s TR data.

    “In keeping with Zalesky et al. (Zalesky et al., 2014), VAR model order was set at 11, appropriately mimicking the expected temporal signature of the BOLD response in 0.72s TR data.”

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Authors
Zalesky, A., Fornito, A., Cocchi, L., Gollo, L. L., & Breakspear, M.
Affiliations
  • The University of Melbourne (AU)
  • The University of Queensland (AU)
  • QIMR Berghofer Medical Research Institute (AU)
Venue
Proceedings of the National Academy of Sciences
Published
2014-06-30
Volume
111
Issue
28
Pages
10341-10346
ISSN
  • 0027-8424 (ISSN-L)
  • 1091-6490
OpenAlex
W1996196481
Cited by
753
References
79
Citations by year
2026: 18 · 2025: 57 · 2024: 49 · 2023: 49 · 2022: 58 · 2021: 82 · 2020: 74 · 2019: 74 · 2018: 65 · 2017: 98 · 2016: 64 · 2015: 51 · 2014: 13
FWCI
42.01
Type
journal article
Language
en
Open access
Locations
  • Proceedings of the National Academy of Sciences (publishedVersion)
  • PubMed Central (publishedVersion)
  • PubMed (publishedVersion)
  • Minerva Access (University of Melbourne) (submittedVersion)
Funders
  • National Institutes of Health (5u54mh091657-05)
  • National Institute of Mental Health (1U54 MH091657, U54-MH091657)
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
resting-state brain networks, dynamic functional connectivity, brain network topology, default mode network, frontoparietal network, network hubs, information transmission efficiency, metabolic cost, brain dynamics, Human Connectome Project
MeSH terms
Adult, Brain, Humans, Magnetic Resonance Imaging, Male, Mental Processes, Nerve Net, Radiography

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