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The functional significance of event-related desynchronization (ERD) of alpha rhythm was investigated in a task which manipulated cognitive load and event rate. It was found that with increasing cognitive load the amount and duration of ERD increased. When a slow event rate was used the mean relative desynchronization of alpha rhythm and duration of ERD(More)
In previous studies, patients with probable Alzheimer's disease (AD) have indicated that they experienced less pain intensity and affect from their painful conditions than nondemented elderly persons. However, in those studies, pain assessment occurred only once. Therefore, it may be possible that pain which had occurred, for example, a day earlier, could(More)
The effects of a subject's activation state on cognitive processing were studied, while subjects performed verbal and non-verbal tasks under a speed and accuracy instruction. It was found that stressing speed influenced the level of prestimulus alpha power and consequently the amount of relative event-related desynchronization (ERD). Increasing task(More)
Abnormal EEGs have been reported in XYY and XXY men located in psychiatric hospitals and prisons. In general, persons resident in institutions are more likely to exhibit EEG abnormalities than "normal" population, and this bias of ascertainment has complicated the interpretation of these results. The present study was conducted in Denmark. Chromosome(More)