Automatic Artifact Detection, Overlapping Windows, and State Transitions
David A. Kaiser, M. B. Sterman · Journal of Neurotherapy · 2000
Earlier laboratory studies of quantitative EEG focused on correlates of human attention and performance disclosed many unresolved technical issues and obstacles.In response to these experiences, Kaiser and Sterman have developed a new QEEG analysis program (SKIL Topometric Software System) designed to address these problems and improve the quality and reliability of evaluations.In this volume, and in a forthcoming series of technical articles, we plan to address these problems and describe the solutions we adopted, as well as some of the new metrics made possible by these solutions.Artifact Detection.The experienced eye can detect ocular artifacts--eye movements and blinks--with relative ease.The composition of these distinct waveforms, in terms of aberrant amplitude and duration, is noticeably dissimilar from cortical potentials.Eye blinks produce electrical magnitudes up to 800 μV, dozen of times larger than most cortical potentials.Blinks are gener-