Estimation Of Cortical Currents From Eeg Signals During N-Back Working Memory Tasks

Electroencephalography studies of working memory have demonstrated cortical activities and oscillatory representations without clarifying what kind of information is stored in memory representations. To answer this question, we measured scalp EEG and fMRI data while participants performed a N-back working memory task. We calculated the current intensities from the estimated cortical currents. To investigate the representation of working memory in the cortical regions, we classified information about its contents using the power spectrum during a retention period. These results indicate that our method classified (to some extent) the oscillatory representations of EEG cortical currents over multiple regions.