Is There a Direct Relation Between EEG Band Spectrum and DMN Activity in fMRI? A Multivariate Exploratory Study

This study uses an EEG-fMRI dataset to examine the relation between fMRI BOLD signals from Default Mode Network (DMN) regions and the conventional EEG band spectral data. Our results indicate that the DMN activity corresponds to the EEG band powers of multiple frequency bands especially from midline electrode sites. The results also indicate that the DMN may be acting similarly in rest and light sleep stages but start to slightly deviate in N2 and largely deviate in N3 stage. This will help us better understanding the relation between EEG parameters (which capture more network-level activity) and fMRI data (which captures more anatomically restricted activity).