RT Journal Article SR Electronic T1 Trial-by-Trial Coupling of Concurrent Electroencephalogram and Functional Magnetic Resonance Imaging Identifies the Dynamics of Performance Monitoring JF The Journal of Neuroscience JO J. Neurosci. FD Society for Neuroscience SP 11730 OP 11737 DO 10.1523/JNEUROSCI.3286-05.2005 VO 25 IS 50 A1 Debener, Stefan A1 Ullsperger, Markus A1 Siegel, Markus A1 Fiehler, Katja A1 von Cramon, D. Yves A1 Engel, Andreas K. YR 2005 UL http://www.jneurosci.org/content/25/50/11730.abstract AB Goal-directed behavior requires the continuous monitoring and dynamic adjustment of ongoing actions. Here, we report a direct coupling between the event-related electroencephalogram (EEG), functional magnetic resonance imaging (fMRI), and behavioral measures of performance monitoring in humans. By applying independent component analysis to EEG signals recorded simultaneously with fMRI, we found the single-trial error-related negativity of the EEG to be systematically related to behavior in the subsequent trial, thereby reflecting immediate behavioral adjustments of a cognitive performance monitoring system. Moreover, this trial-by-trial EEG measure of performance monitoring predicted the fMRI activity in the rostral cingulate zone, a brain region thought to play a key role in processing of response errors. We conclude that investigations of the dynamic coupling between EEG and fMRI provide a powerful approach for the study of higher order brain functions.