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It has recently been reported that prestimulus electroencephalogram (EEG) frontal theta and occipital alpha oscillations of healthy controls were modulated by the type of upcoming tasks, reflecting prestimulus top-down preparation. The present study explored the differences in dynamics of frontal theta and occipital alpha activities between obsessive-compulsive disorder (OCD) patients and healthy...
Since prestimulus EEG alpha activity has recently been considered to convey prestimulus top-down processing, we investigated whether prestimulus alpha activity reflects temporal expectancy of upcoming stimulation even under the non-classical contingent negative variation (CNV) paradigm. EEG was recorded from 16 subjects performing a color and a shape discrimination task manipulated with constant and...
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