A Comparative Study on the Detection of Covert Attention in Event-Related EEG and MEG Signals to Control a BCI

Frontiers in Neuroscience
Christoph ReichertHermann Hinrichs

Abstract

In brain-computer interface (BCI) applications the detection of neural processing as revealed by event-related potentials (ERPs) is a frequently used approach to regain communication for people unable to interact through any peripheral muscle control. However, the commonly used electroencephalography (EEG) provides signals of low signal-to-noise ratio, making the systems slow and inaccurate. As an alternative noninvasive recording technique, the magnetoencephalography (MEG) could provide more advantageous electrophysiological signals due to a higher number of sensors and the magnetic fields not being influenced by volume conduction. We investigated whether MEG provides higher accuracy in detecting event-related fields (ERFs) compared to detecting ERPs in simultaneously recorded EEG, both evoked by a covert attention task, and whether a combination of the modalities is advantageous. In our approach, a detection algorithm based on spatial filtering is used to identify ERP/ERF components in a data-driven manner. We found that MEG achieves higher decoding accuracy (DA) compared to EEG and that the combination of both further improves the performance significantly. However, MEG data showed poor performance in cross-subject classific...Continue Reading

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Citations

May 1, 2020·Frontiers in Human Neuroscience·Laurien Nagels-CouneBettina Sorger
Jun 5, 2018·Computational Intelligence and Neuroscience·Jaehong YoonMincheol Whang
Oct 10, 2020·PloS One·Olivier Le MeurRémi Cozot

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