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- M M Doppelmayr, W Klimesch, T Pachinger, and B Ripper.
- Department of Physiological Psychology, University of Salzburg, Austria. michael.doppelmayr@sbg.ac.at
- Brain Topogr. 1998 Jan 1; 11 (2): 133-40.
AbstractThe question is examined whether the extent of changes in relative band power as measured by event-related desynchronization (ERD) depends on absolute band power. The results for target stimuli of a simple oddball task indicate that the prestimulus (reference) level of absolute band power has indeed a strong influence on ERD. Whereas for the alpha band large band power in the reference interval is related to a strong degree of alpha suppression as measured by ERD, the opposite holds true for the theta band. Here, a low level of band power during the reference interval is related to a pronounced increase in band power during the processing of the target stimulus. In contrast to alpha and theta, ERD in the delta band is not influenced by the magnitude of band power in the reference interval.
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