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Updated: Jun 26, 2026
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Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy
Published on: May 27, 2020
Predicting human resting-state functional connectivity from structural connectivity
Summary
Brain activity measured by functional MRI (fMRI) shows functional connectivity, which is influenced by anatomical structure. Computational models reveal that while indirect connections matter, anatomical structure constrains functional brain networks.
Area of Science:
- Neuroscience
- Computational Neuroscience
- Systems Neuroscience
Background:
- Neuronal population activity in the cerebral cortex is dynamic.
- Functional connectivity, measured via fMRI, describes temporal coherence between neuronal populations.
- Previous work linked functional connectivity to structural connectivity at a broad level.
Purpose of the Study:
- To investigate if anatomical network properties explain systems-level functional network characteristics.
- To model macroscopic cortical dynamics using anatomical connectivity data.
- To analyze the spatial statistics and temporal persistence of functional networks.
Main Methods:
- Measured high-resolution resting-state functional connectivity using fMRI.
- Measured high-resolution structural connectivity using diffusion spectrum imaging tractography.
- Employed computational modeling with structural connectivity as input for cortical dynamics.
Main Results:
- Observed strong functional connections without direct structural links, complicating inference.
- Found indirect connections and distance explained variance in functional connectivity.
- Noted variability in resting-state functional connectivity across sessions and model runs.
Conclusions:
- Resting-state functional connectivity is variable and often lacks direct structural basis.
- Large-scale anatomical structure constrains the strength, persistence, and spatial statistics of functional connectivity.
- Inferring precise structural connectivity from functional connectivity alone is impractical.
