Studies of schizophrenic patients using MEG in a working memory test showed a possibility of classifying schizophrenia by spectro-temporal-spatial MEG patterns [7, 8]. These studies showed that most ERD patterns are extracted in delta, alpha, and beta frequency bands, and these features were located in the left dorso-frontal, occipital, and left fronto-temporal areas, respectively, in the word condition. Compared to these studies, our finding corresponded to ERD patterns as dysfunctions in the dorso-frontal, occipital, and fronto-temporal areas, but did not always correspond to them as to laterality. These differences may be caused by differences between the oddball task and the working memory test. Our study also confirmed a possibility of classification of schizophrenia using measurement of spatiotemporal dynamics of cortical oscillation across brain regions with MEG.
