Investigating human brain function can be improved by employing a multimodal functional neuroimaging approach. The fusion of non-invasive electroencephalogram (EEG) and hemodynamic neuroimaging modalities including functional magnetic resonance imaging (fMRI) and functional near-infrared spectroscopy (fNIRS) is able to provide complementary information of brain activity with higher spatiotemporal resolution. To address recent developments in multimodal imaging techniques, algorithms and instrumentations, we first describe the potential and limitations of the presently developed fusion...