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Microstate and Omega Complexity Analyses of the Resting-state Electroencephalography
Published on: June 15, 2018
Resting-state intracranial high-frequency oscillations and human cognition
Daniel Wendelken1, Brian Ervin2, Taylor Cummins2
1Department of Computer Science, University of Cincinnati, Cincinnati, OH, USA.
Neuroimage
|August 1, 2026
Summary
High-frequency oscillations (HFOs) in the brain correlate with cognitive functions, showing distinct patterns across hemispheres. These findings reveal HFOs
Area of Science:
- Neuroscience
- Cognitive Neuroscience
- Epileptology
Background:
- High-frequency oscillations (HFOs) are increasingly recognized as potential biomarkers in epilepsy and indicators of neural function.
- Understanding the relationship between HFOs and cognitive performance is crucial for localizing brain function and developing targeted therapies.
Purpose of the Study:
- To investigate the association between the rate of high-frequency oscillations (HFO-Rs) and neuropsychological test scores in drug-resistant epilepsy patients.
- To explore how local HFO-Rs modulate functional connectivity in brain regions linked to cognitive performance.
- To determine if regional variations in cortical HFO-Rs correlate with domain-specific cognitive abilities.
Main Methods:
- Analysis of HFO-Rs in 6048 gray matter channels from stereo-electroencephalography (SEEG) data in 59 patients, excluding epileptogenic and lesional areas.
- Correlation of HFO-Rs with standardized neuropsychological scores from Wechsler scales, Woodcock-Johnson tests, and Wide-Range Assessments of Memory and Learning.
- Quantification of functional connectivity modulation by local HFO-Rs in regions with significant HFO-R-cognitive score associations.
Main Results:
- Significant covariation between HFO-Rs and cognitive scores was observed in specific brain regions, with notable hemispheric asymmetries.
- Right hemisphere showed a higher proportion of positive HFO-R-cognitive score relationships (81% vs. 37% in the left hemisphere).
- HFO-Rs modulated functional connectivity, forming networks with self-connections and interconnections primarily within the right hemisphere.
Conclusions:
- Cortical HFO-Rs play a significant role in human cognition, extending beyond their association with epilepsy.
- HFO-Rs modulate long-range neural connectivity, influencing cognitive performance.
- The findings provide a neurophysiological framework for understanding individual differences in cognitive domains.
