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Updated: Feb 3, 2026
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Mapping Cortical Dynamics Using Simultaneous MEG/EEG and Anatomically-constrained Minimum-norm Estimates: an Auditory Attention Example
Published on: October 24, 2012
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Mental processing comparison between past and future employing a novel EEG analysis based on radiated EM field
Adrianos G Katsouris1, Nikolaos C Kapsalis1, Xanthi Stachtea2
1Wireless & Long Distance Communications Laboratory, Department of Information Transmission Systems & Materials Technology, School of Electrical & Computer Engineering, National Technical University of Athens, 9, Iroon Polytechniou Str., P.O. 15773, Zografou Campus, Athens, Greece.
Journal of Neuroscience Methods
|October 21, 2018
Summary
This study introduces a new ElectroEncephaloGraphy (EEG) analysis method using radiated electromagnetic field estimation. The technique transforms brain activity analysis to a far-field radiation basis, offering new insights into mental processing and concentration.
Area of Science:
- Neuroscience
- Electromagnetism
- Signal Processing
Background:
- The inverse problem in ElectroEncephaloGraphy (EEG) analysis has been studied for decades using mathematical and electromagnetic (EM) methods.
- Existing techniques often rely on complex head models for near-field prediction.
Purpose of the Study:
- To propose a novel radiated EM field estimation analysis scheme for EEG.
- To compute the extrapolated far field from a grid of equivalent distributed EM sources.
- To enable comparison of concentration differences related to past and future mental states.
Main Methods:
- Determining a grid of equivalent distributed EM sources with equal magnetic moments.
- Utilizing a Pattern Search approach to minimize Mean Absolute Relative Error.
- Extrapolating the far field from near-field EM measurements.
Main Results:
- The method was applied to brain activity recordings from a mental-auditory experiment.
- Demonstrated capability in comparing subject concentration differences between present/past and present/future.
- Successfully computed the extrapolated far field based on the novel scheme.
Conclusions:
- The proposed method integrates mathematical and EM theory for enhanced EEG analysis.
- Transforms conventional EEG analysis to a far-field radiation basis.
- Treating the brain as a far-field radiator offers a promising new perspective for analyzing brain activity during mental processing.
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