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- W2020787270 abstract "Abstract Using a spatially filtered MEG analysis, we investigated the propagation of cortical activities of the neural network during the Stroop task with 50-ms temporal resolution. Four right-handed healthy Japanese volunteers were studied. Tomographic distribution of the neural activity was determined using a novel spatial filtering technique, synthetic aperture magnetometry (SAM). 600-ms epochs just after the presentation of one hundred incongruent stimuli were analyzed with a 200-ms time window moving by every 50 ms. Occipital areas (two subjects), the left dorsolateral prefrontal cortex (DLPFC) (four subjects), right DLPFC (three subjects) and the right anterior prefrontal cortex (two subjects) were activated during 100–550 ms, 150–600 ms, 150–600 ms, 200–550 ms, respectively. In every subject, the activated order of those areas was the same. Activation of DLPFC during the Stroop task is in accordance with neuropsychological studies, while activation of the anterior cingulate cortex (ACC) was reported with PET studies, suggesting transient inhibitory function of the prefrontal and continuing selective attention of ACC. This study clarifies that visual information processing and inhibitory function are in a certain order temporally overlapping in the neural network during the task. It is suggested that this analysis has an advantage to investigate the activity of the neural network in the cognitive task, when compared with the equivalent current dipole (ECD) analysis of MEG and functional imaging with PET." @default.
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- W2020787270 date "2002-04-01" @default.
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- W2020787270 title "Spatially filtering MEG analysis estimates propagation of cortical activities during the Stroop task" @default.
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- W2020787270 doi "https://doi.org/10.1016/s0531-5131(01)00838-x" @default.
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