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RemovingArtifactsWithADJUST

What is ADJUST

A major problem in the analysis of MEG/EEG recordings is that the activity due to artifacts has typically much higher amplitude than the one generated by neural sources. A successful method for removing artifacts from EEG recordings is Independent Component Analysis (ICA), but its implementation remains largely user-dependent. To overcome this limitation, we have developed ADJUST, a completely automatic algorithm that identifies artifacted Independent Components (IC) by combining stereotyped artifact-specific spatial and temporal features. Features are optimised to capture blinks, eye movements and generic discontinuities. Once artifacted IC are identified, they can be simply removed from the data while leaving the activity due to neural sources almost unaffected.

ADJUST has been implemented as a plugin of the EEGLAB toolbox, a matlab-based software for analysis of electrophysiological data. The ADJUST plugin uses EEGLAB's functions to preprocess the data and compute the ICA, and its excellent visualization tools to display the properties of the artifacted IC in multiple dimensions (topography, time course, power spectrum).

Reference

For the details of the algorithm and its validation on real data see:
Mognon, A., Jovicich, J., Bruzzone, L., Buiatti, M., ADJUST: An Automatic EEG artifact Detector based on the Joint Use of Spatial and Temporal features. Psychophysiology, in press (2010).
Please cite this paper to reference ADJUST in publications.

Download ADJUST

Copyright (C) 2009 Andrea Mognon and Marco Buiatti, Center for Mind/Brain Sciences, University of Trento, Italy

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 2 of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with this program; if not, write to the Free Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA

• Download ADJUST plugin for EEGLAB here.
• Download ADJUST tutorial here.
• Download ADJUST tutorial sample data here.

Support

Please contact adjust.staff AT gmail.com

ADJUST for MEG data

At present, ADJUST is optimized for removing artifacts from EEG data. An ADJUST development specific for MEG data, including a module for heart beat detection, is currently under testing. Please contact Marco Buiatti (marco dot buiatti at gmail dot com) for details.