Title :
Spatial patterns underlying the human electroencephalogram
Author :
Koles, Z.J. ; Lazar, M.S. ; Kasmia, A. ; Zhou, Z.
Author_Institution :
Dept. of Appl. Sci. in Med., Alberta Univ., Edmonton, Alta., Canada
Abstract :
The electroencephalograms (EEGs) obtained from over 40 normal individuals at rest with eyes open and eyes closed were collected and analyzed by decomposing them into a linear combination of spatial patterns. The patterns were obtained by the simultaneous diagonalization of two correlation matrices derived from the EEGs in the two states. The results indicate that only two of the patterns are necessary in order to discriminate over 90% of the epochs recorded in the eyes-open state and almost 80% of those recorded during the eyes-closed state. Presented as topographic maps, the two patterns show the different electrical organization of the brain in the two states. The utility of depicting the EEG in terms of underlying spatial patterns, particularly for source localization is discussed
Keywords :
electroencephalography; brain electrical organization; correlation matrices; eyes-closed state; eyes-open state; human electroencephalogram; source localization; topographic maps; underlying spatial patterns; Electrodes; Electroencephalography; Engineering in medicine and biology; Eyes; Humans; Matrix decomposition; Pattern analysis; Societies; Symmetric matrices;
Conference_Titel :
Engineering in Medicine and Biology Society, 1989. Images of the Twenty-First Century., Proceedings of the Annual International Conference of the IEEE Engineering in
Conference_Location :
Seattle, WA
DOI :
10.1109/IEMBS.1989.96190
