|Simultaneous EEG-fMRI recordings (EEG-fMRI)|
Simultaneous EEG-fMRI recordings require the presence of MRI compatible EEG amplifiers and electrodes. EEG-fMRI allows for simultaneous acquisition of electrophysiology (EEG) and hemodynamic (fMRI) information. EEG-fMRI thus provides high spatial and temporal resolution with regard to anatomical localization and on-line signal registration. Because of the large artifacts generated in the EEG recording from the switching on-off of the MRI gradients, particular care has to be taken for artefact removal in the recordings. EEG-fMRI data are often analyzed using an independent component analysis (ICA) approach, which allows for single trial analysis of correlations between e.g. ERP and BOLD amplitudes.