Methods for the fMRI-EEG/MEG integrated neuroimaging are categorized into two types: the fMRI-constrained electromagnetic source imaging or localization and the EEG/MEG-informed fMRI analysis. As the names suggest, the former rests on the EEG/MEG source imaging while incorporating spatial information from fMRI; the latter utilizes the time and/or frequency specific electrophysiological information to derive regressors in the fMRI analysis.
