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Arquivos de Neuro-Psiquiatria

Print version ISSN 0004-282XOn-line version ISSN 1678-4227

Abstract

ANGHINAH, Renato et al. Biologic artifacts in quantitative EEG. Arq. Neuro-Psiquiatr. [online]. 2006, vol.64, n.2a, pp.264-268. ISSN 0004-282X.  http://dx.doi.org/10.1590/S0004-282X2006000200017.

We studied the influence of five biologic artifacts sources on quantitative EEG (blinking, forced eyes closure, forced jaw closure, tongue movements and pursuit eyes movements) through both visual and spectral analysis, with the purpose of verifying how do these artifacts can be seen in a cartographic way. We found that the spectrum’s potencials showed the same topographic display that was found through visual analysis. Visual analysis was superior than the quantitative evaluation to recognise the artifacts, as the former preserved the morphological display of the paroxisms. However it is important know how do the potencials are represented in quantitative maps, so that they can be identified as artifacts and not as pathologic EEG activity.

Keywords : artifacts; electroencephalogram; brain mapping.

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