Simultaneous recording of EEG and functional MRI

Abstract The simultaneous recording of the electroencephalogram (EEG) and functional magnetic resonance imaging (fMRI) provides a better understanding of the relationship between hemodynamic and electrical brain activation and is thought to be a powerful technique for studying brain function. However, the acquisition of EEG during fMRI experiments raises important practical issues for patient safety and for the artifacts of MRI images and EEG waveforms. It made it possible to acquire clear MRI images and EEG tracings with sufficient patient safety by using electrodes with register and with twisted leads. The simultaneous recording of fMRI and EEG has been applied to several clinical studies: epilepsy, sleep and ERP studies. It also makes it possible to monitor the arousal level of the subject during cognitive task. We confirmed that activated areas during pursuit eye movement tasks were different by the arousal level. Monitoring the arousal level of the subjects using fMRI and EEG simultaneous recording is thought to be crucial for the cognitive task.