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Network structure shapes spontaneous functional connectivity dynamics.

Kelly Shen1, R Matthew Hutchison2, Gleb Bezgin3

  • 1Rotman Research Institute, Baycrest, Toronto, Ontario M6A 2E1, Canada, kshen@research.baycrest.org.

The Journal of Neuroscience : the Official Journal of the Society for Neuroscience
|April 10, 2015
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Summary
This summary is machine-generated.

Brain

Keywords:
functional MRIfunctional connectivitylarge-scale dynamicsrich club organizationstructural connectivity

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Area of Science:

  • Neuroscience
  • Systems Neuroscience
  • Computational Neuroscience

Background:

  • Brain's structural organization dictates regional interactions and information processing.
  • Dynamic functional connectivity (FC) reflects brain region coordination and is expected to link to structural networks.

Purpose of the Study:

  • To investigate how the brain's structural network influences dynamic functional connectivity (FC) patterns.
  • To compare resting-state FC (rsFC) with structural connectivity in macaques.

Main Methods:

  • Acquired resting-state fMRI data from macaques (Macaca fascicularis).
  • Utilized macaque axonal tract tracing studies for structural connectivity data.
  • Compared rsFC dynamics with underlying structural connections over varying sample durations.

Main Results:

  • Correspondence between rsFC and structural connectivity strengthened with increased sample duration.
  • Regions with direct structural links exhibited the most stable rsFC.
  • Dynamic coordination occurs through direct and polysynaptic pathways.
  • Functional connections within the structural rich-club core showed highest temporal stability.

Conclusions:

  • Brain's structural architecture constrains dynamic functional coordination.
  • FC dynamics are influenced by direct structural connections and polysynaptic pathways.
  • Temporal stability of functional connectivity is dependent on structural topology, particularly within the rich-club core.