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Authors: P. Rente Lourenço ; W. W. Abbott and A. A. Faisal

Affiliation: Imperial College London, United Kingdom

ISBN: 978-989-758-056-7

Keyword(s): EEG, Eye-Tracking, Ocular Artefacts, ICA, Wiener Filter, Wavelet Decomposition.

Related Ontology Subjects/Areas/Topics: Biomedical Engineering ; Biomedical Instruments and Devices ; Brain-Computer Interfaces ; Devices ; Electrical and Magnetic Recordings ; EMG Signal Processing and Applications ; Health Engineering and Technology Applications ; Human-Computer Interaction ; Neural Rehabilitation ; NeuroSensing and Diagnosis ; Neurotechnology, Electronics and Informatics ; Outcome Measures ; Physiological Computing Systems

Abstract: Electroencephalograms (EEG) are a widely used brain signal recording technique. The information conveyed in these recordings can be an extremely useful tool in the diagnosis of some diseases and disturbances, as well as in the development of non-invasive Brain-Machine Interfaces (BMI). However, the non-invasive electrical recording setup comes with two major downsides, a. poor signal-to-noise ratio and b. the vulnerability to any external and internal noise sources. One of the main sources of artefacts are eye movements due to the electric dipole between the cornea and the retina. We have previously proposed that monitoring eye-movements provide a complementary signal for BMIs. He we propose a novel technique to remove eye-related artefacts from the EEG recordings. We couple Eye Tracking with EEG allowing us to independently measure when ocular artefact events occur and thus clean them up in a targeted manner instead of using a "blind" artefact clean up correction technique. Three sta ndard methods of artefact correction were applied in an event-driven, supervised manner: 1. Independent Components Analysis (ICA), 2. Wiener Filter and 3. Wavelet Decomposition and compared to "blind" unsupervised ICA clean up. These are standard artefact correction approaches implemented in many toolboxes and experimental EEG systems and could easily be applied by their users in an event-driven manner. Already the qualitative inspection of the clean up traces show that the simple targeted artefact event-driven clean up outperforms the traditional “blind” clean up approaches. We conclude that this justifies the small extra effort of performing simultaneous eye tracking with any EEG recording to enable simple, but targeted, automatic artefact removal that preserves more of the original signal. (More)

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Paper citation in several formats:
Lourenço, P.; Abbott, W. and Faisal, A. (2014). EEG and Eye-Tracking Integration for Ocular Artefact Correction.In Proceedings of the 2nd International Congress on Neurotechnology, Electronics and Informatics - Volume 1: NEUROTECHNIX, ISBN 978-989-758-056-7, pages 79-86. DOI: 10.5220/0005094600790086

author={P. Rente Louren\c{C}o. and W. W. Abbott. and A. A. Faisal.},
title={EEG and Eye-Tracking Integration for Ocular Artefact Correction},
booktitle={Proceedings of the 2nd International Congress on Neurotechnology, Electronics and Informatics - Volume 1: NEUROTECHNIX,},


JO - Proceedings of the 2nd International Congress on Neurotechnology, Electronics and Informatics - Volume 1: NEUROTECHNIX,
TI - EEG and Eye-Tracking Integration for Ocular Artefact Correction
SN - 978-989-758-056-7
AU - Lourenço, P.
AU - Abbott, W.
AU - Faisal, A.
PY - 2014
SP - 79
EP - 86
DO - 10.5220/0005094600790086

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