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Updated: Jan 10, 2026
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Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography
Published on: June 15, 2018
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Microstate in rats' EEG: a proof of concept study
Vaclava Piorecka1,2, Cestmir Vejmola3,4, Petra Peskova1
1Dept. of Biomedical Technology, Faculty of Biomedical Engineering, Czech Technical University in Prague, Kladno, Czech Republic.
Translational Psychiatry
|November 21, 2025
Summary
Researchers identified recurring brain activity patterns, known as microstates, in rat electroencephalograms (EEGs). These rat microstates are comparable to human microstates, offering a new preclinical tool for brain research.
Area of Science:
- Neuroscience
- Brain Activity Analysis
- Animal Models
Background:
- Electroencephalogram (EEG) microstates are brief, recurring neural activity patterns studied in humans for cognitive processes.
- Microstate analysis is a valuable tool for understanding human brain function.
- The presence and characteristics of microstates in animal models remain underexplored.
Purpose of the Study:
- To detect and characterize EEG microstates in rats.
- To compare rat microstates with human microstates using similar metrics.
- To establish microstates as a potential preclinical research tool.
Main Methods:
- Collected EEG data from rats using a superficial electrode system.
- Applied microstate analysis techniques to rat EEG data.
- Utilized source localization to identify brain regions associated with microstates.
Main Results:
- Identified five distinct EEG microstate maps in rats, explaining 71% of the variance.
- Rat microstate metrics (explained variance, temporal coverage, duration) are comparable to human values.
- Source localization linked microstates to the cingulate cortex, precuneus, and insula.
- Some microstates showed associations with theta and alpha frequency bands.
Conclusions:
- EEG microstates are present and quantifiable in rats using human-comparable metrics.
- Rat microstates show similarities to human microstates in terms of temporal dynamics and associated brain regions.
- Microstate analysis in rats holds promise as a preclinical tool for brain function research and biomarker discovery, facilitating translation to human studies.
