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Updated: May 16, 2026
07:13
Cerebral Blood Flow-Based Resting State Functional Connectivity of the Human Brain using Optical Diffuse Correlation Spectroscopy
Published on: May 27, 2020
Coupling between resting cerebral perfusion and EEG
R L O'Gorman1, S-S Poil, D Brandeis
1Center for MR-Research, University Children's Hospital Zurich, Steinwiesstrasse 75, CH-8032, Zurich, Switzerland.
Brain Topography
|November 20, 2012
Summary
This study reveals frequency-specific links between electroencephalography (EEG) power and brain perfusion. Lower EEG frequencies correlate with reduced blood flow, while higher frequencies show positive correlations, impacting attention networks.
Area of Science:
- Neuroscience
- Neuroimaging
- Physiology
Background:
- Limited understanding of electroencephalography (EEG) oscillations and baseline brain hemodynamics.
- Few studies link EEG power outside the alpha band to baseline cerebral blood flow.
Purpose of the Study:
- To investigate associations between EEG power across various frequency bands and baseline brain perfusion.
- To explore frequency-specific correlations between EEG oscillations and cerebral blood flow in healthy adults.
Main Methods:
- Utilized whole-brain arterial spin labeling perfusion MRI and EEG.
- Recorded data from 16 healthy adults during an eyes-closed rest condition.
- Analyzed correlations between global average EEG power and regional perfusion.
Main Results:
- Positive correlations found between EEG power in middle (alpha) and high (beta, gamma) frequency bands and perfusion.
- Negative correlations observed between delta EEG frequency and perfusion.
- Central alpha frequency positively correlated with attention-related brain regions.
- Central theta frequency negatively correlated with widespread cortical regions.
Conclusions:
- EEG power and local cerebral blood flow coupling is frequency-dependent.
- Results support the concept that decreasing EEG frequencies correlate with decreasing brain activation levels.
