In this regard, the integration of fMRI and EEG/MEG has received the most interest. Electrophysiological and hemodynamic/metabolic signals reflect distinct but closely coupled aspects of the underlying neural activity. Combining fMRI and EEG/MEG data allows us to study brain function from different perspectives. Convergent evidence, on one hand, definitely leads to much more confident conclusions on understanding the neural mechanisms. Contradictory observations, on the other hand, also pose new hypotheses and challenges necessary to guide further investigations of the human neural system.
