Removing the cardiac field artifact from the EEG using neural network regression.

Autor: Arnau S; Leibniz Research Centre for Working Environment and Human Factors Dortmund (IfADo), Dortmund, Germany., Sharifian F; School of Computer Science and Mathematics, Liverpool John Moores University, Liverpool, UK., Wascher E; Leibniz Research Centre for Working Environment and Human Factors Dortmund (IfADo), Dortmund, Germany., Larra MF; Leibniz Research Centre for Working Environment and Human Factors Dortmund (IfADo), Dortmund, Germany.
Jazyk: angličtina
Zdroj: Psychophysiology [Psychophysiology] 2023 Oct; Vol. 60 (10), pp. e14323. Date of Electronic Publication: 2023 May 06.
DOI: 10.1111/psyp.14323
Abstrakt: When EEG recordings are used to reveal interactions between central-nervous and cardiovascular processes, the cardiac field artifact (CFA) poses a major challenge. Because the electric field generated by cardiac activity is also captured by scalp electrodes, the CFA arises as a heavy contaminant whenever EEG data are analyzed time-locked to cardio-electric events. A typical example is measuring stimulus-evoked potentials elicited at different phases of the cardiac cycle. Here, we present a nonlinear regression method deploying neural networks that allows to remove the CFA from the EEG signal in such scenarios. We train neural network models to predict R-peak centered EEG episodes based on the ECG and additional CFA-related information. In a second step, these trained models are used to predict and consequently remove the CFA in EEG episodes containing visual stimulation occurring time-locked to the ECG. We show that removing these predictions from the signal effectively removes the CFA without affecting the intertrial phase coherence of stimulus-evoked activity. In addition, we provide the results of an extensive grid search suggesting a set of appropriate model hyperparameters. The proposed method offers a replicable way of removing the CFA on the single-trial level, without affecting stimulus-related variance occurring time-locked to cardiac events. Disentangling the cardiac field artifact (CFA) from the EEG signal is a major challenge when investigating the neurocognitive impact of cardioafferent traffic by means of the EEG. When stimuli are presented time-locked to the cardiac cycle, both sources of variance are systematically confounded. Here, we propose a regression-based approach deploying neural network models to remove the CFA from the EEG. This approach effectively removes the CFA on a single-trial level and is purely data-driven, providing replicable results.
(© 2023 The Authors. Psychophysiology published by Wiley Periodicals LLC on behalf of Society for Psychophysiological Research.)
Databáze: MEDLINE
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