Spatiotemporal Analysis of Multichannel EEG: CARTOOL

This paper describes methods to analyze the brain's electric fields recorded with multichannel Electroencephalogram (EEG) and demonstrates their implementation in the software CARTOOL. It focuses on the analysis of the spatial properties of these fields and on quantitative assessment of changes...

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Bibliographic Details
Published in:Computational Intelligence and Neuroscience 2011-01, Vol.2011 (2011), p.276-290
Main Authors: Brunet, Denis, Murray, Micah M., Michel, Christoph M.
Format: Article
Language:English
Subjects:
Analysis of Variance
Brain - physiology
Brain Mapping
Electric fields
Electrodes
Electroencephalography
Electroencephalography - methods
Electronic data processing
Evoked Potentials - physiology
Humans
Imaging, Three-Dimensional
Magnetic Resonance Imaging - methods
Mapping
Medical imaging
Methods
Neuroimaging
Neurosciences
Numerical Analysis, Computer-Assisted
Review
Software
Software - trends
Spatial analysis
Technology application
Time Factors
Time series
Topography
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Summary:This paper describes methods to analyze the brain's electric fields recorded with multichannel Electroencephalogram (EEG) and demonstrates their implementation in the software CARTOOL. It focuses on the analysis of the spatial properties of these fields and on quantitative assessment of changes of field topographies across time, experimental conditions, or populations. Topographic analyses are advantageous because they are reference independents and thus render statistically unambiguous results. Neurophysiologically, differences in topography directly indicate changes in the configuration of the active neuronal sources in the brain. We describe global measures of field strength and field similarities, temporal segmentation based on topographic variations, topographic analysis in the frequency domain, topographic statistical analysis, and source imaging based on distributed inverse solutions. All analysis methods are implemented in a freely available academic software package called CARTOOL. Besides providing these analysis tools, CARTOOL is particularly designed to visualize the data and the analysis results using 3-dimensional display routines that allow rapid manipulation and animation of 3D images. CARTOOL therefore is a helpful tool for researchers as well as for clinicians to interpret multichannel EEG and evoked potentials in a global, comprehensive, and unambiguous way.
ISSN:1687-5265
1687-5273
DOI:10.1155/2011/813870