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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.<\/jats:p>","DOI":"10.1155\/2011\/813870","type":"journal-article","created":{"date-parts":[[2011,1,5]],"date-time":"2011-01-05T14:50:34Z","timestamp":1294239034000},"page":"1-15","source":"Crossref","is-referenced-by-count":620,"title":["Spatiotemporal Analysis of Multichannel EEG: CARTOOL"],"prefix":"10.1155","volume":"2011","author":[{"given":"Denis","family":"Brunet","sequence":"first","affiliation":[{"name":"Functional Brain Mapping Laboratory, Departments of Fundamental and Clinical Neurosciences, University Medical School, University of Geneva, 1 rue Michel-Servet, 1211 Geneva, Switzerland"},{"name":"EEG Brain Mapping Core, Center for Biomedical Imaging (CIBM), 1211 Geneva, Switzerland"}]},{"given":"Micah M.","family":"Murray","sequence":"additional","affiliation":[{"name":"EEG Brain Mapping Core, Center 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