Automatic Artifact Removal (AAR) toolbox
v1.3 (Release 09.12.2007) for MATLAB
Germ´an G´omez-Herrero
Tampere University of Technology
December 11, 2007
Abstract
This MATLAB toolbox integrates several state-of-the-art methods
for automatic removal of artifacts in the electroencephalogram (EEG).
The methods implemented so far are only for removal of ocular (EOG)
and muscular (EMG) artifacts. EOG removal methods include regres-
sion techniques based on Least Mean Squares (LMS), Recursive Least
Squares (RLS) and other adaptive algorithms. However, the core func-
tionality of the toolbox is a general-purpose artifact removal procedure
that consists on three steps. First, the EEG data is decomposed into
several spatial components using Blind Source Separation (BSS). Sec-
ond, a suitable criteria is used to automatically detect artifact-related
components. Third, the EEG data is reconstructed using only non-
artifactual components. The toolbox is designed so that the user can
easily expand it by adding new BSS algorithms and new criteria for
detecting artifactual components. Furthermore it can be easily inte-
grated as a plug-in into EEGLAB, which is a very popular graphical
toolbox for EEG analysis and visualization in MATLAB.
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