Automatic Ocular Artifact Correction in Electroencephalography for Neurofeedback

Cassandra Dumas, Marie Constance Corsi, Claire Dussard, Fanny Grosselin, Fanny Grosselin, Nathalie George, Nathalie George

2025

Abstract

Ocular artifacts can significantly impact electroencephalography (EEG) signals, potentially compromising the performance of neurofeedback (NF) and brain-computer interfaces (BCI) based on EEG. This study investigates if the Approximate Joint Diagonalization of Fourier Cospectra (AJDC) method can effectively correct blink-related artifacts and preserve relevant neurophysiological signatures in a pseudo-online context. AJDC is a frequency-domain Blind Source Separation (BSS) technique, which uses cospectral analysis to isolate and attenuate blink artifacts. Using EEG data from 21 participants recorded during a NF motor imagery (MI) task, we compared AJDC with Independent Component Analysis (ICA), a widely used method for EEG denoising. We assessed the quality of blink artifact correction, the preservation of MI-related EEG signatures, and the influence of AJDC correction on the NF performance indicator. We show that AJDC effectively attenuates blink artifacts without distorting MI-related beta band signatures and with preservation of NF performance. AJDC was calibrated once on initial EEG data. We therefore assessed AJDC correction quality over time, showing some decrease. This suggests that periodic recalibration may benefit long EEG recording. This study highlights AJDC as a promising real-time solution for artifact management in NF, with the potential to provide consistent EEG quality and to enhance NF reliability.

Paper Citation

in Harvard Style

Dumas C., Corsi M., Dussard C., Grosselin F. and George N. (2025). Automatic Ocular Artifact Correction in Electroencephalography for Neurofeedback. In Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIOSIGNALS; ISBN 978-989-758-731-3, SciTePress, pages 773-783. DOI: 10.5220/0013260900003911

in Bibtex Style

@conference{biosignals25,
author={Cassandra Dumas and Marie Corsi and Claire Dussard and Fanny Grosselin and Nathalie George},
title={Automatic Ocular Artifact Correction in Electroencephalography for Neurofeedback},
booktitle={Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIOSIGNALS},
year={2025},
pages={773-783},
publisher={SciTePress},
organization={INSTICC},
doi={10.5220/0013260900003911},
isbn={978-989-758-731-3},
}

in EndNote Style

TY - CONF

JO - Proceedings of the 18th International Joint Conference on Biomedical Engineering Systems and Technologies - Volume 1: BIOSIGNALS
TI - Automatic Ocular Artifact Correction in Electroencephalography for Neurofeedback
SN - 978-989-758-731-3
AU - Dumas C.
AU - Corsi M.
AU - Dussard C.
AU - Grosselin F.
AU - George N.
PY - 2025
SP - 773
EP - 783
DO - 10.5220/0013260900003911
PB - SciTePress