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Unfold: an integrated toolbox for overlap correction, non-linear modeling, and regression-based EEG analysis.
Benedikt V Ehinger1,2, Olaf Dimigen3
1Institute of Cognitive Science, Universität Osnabrück, Osnabrück, Germany.
Peerj
|October 30, 2019
Summary
The new unfold toolbox offers a flexible MATLAB framework for analyzing overlapping electroencephalogram (EEG) data. This regression-based approach handles complex experimental designs and various physiological signals effectively.
Area of Science:
- Neuroscience
- Cognitive Science
- Biomedical Engineering
Background:
- Electrophysiological research is shifting towards complex, naturalistic designs.
- Overlapping neural responses and confounding variables are common challenges.
- Existing methods struggle with systematic temporal overlap and low-level confounds.
Purpose of the Study:
- Introduce a novel MATLAB toolbox, unfold, for advanced electroencephalogram (EEG) analysis.
- Provide a unified framework for regression-based EEG analyses, combining deconvolution and non-linear modeling.
- Facilitate the disentanglement of overlapping neural signals in complex experimental paradigms.
Main Methods:
- Developed a modular, regression-based analysis framework in MATLAB.
- Integrated massive univariate modeling, linear deconvolution, and generalized additive models.
- Incorporated regularization and temporal basis functions for enhanced analysis.
Main Results:
- Demonstrated the efficacy of unfold with simulated and real face recognition data.
- Showcased the toolbox's ability to handle complex, overlapping EEG signals.
- Validated its application in combined EEG/eye-tracking and multisensory experiments.
Conclusions:
- The unfold toolbox provides a powerful and user-friendly solution for complex EEG data analysis.
- It effectively addresses challenges posed by overlapping responses and confounding variables.
- Applicable to traditional and non-conventional EEG/ERP designs, as well as other physiological signals.
Keywords:
EEGERPGeneralized additive modelLinear modeling of EEGNon-linear modelingOpen source toolboxOverlap correctionRegression splinesRegression-ERPRegularizationMore Related Videos
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