A multi-channel recursive least squares filter for motion and ballistocardiogram artefacts in EEG recorded in the MR scanner
J. Masterton R, Jackson G, Fleming S, Abbott D
Brain Research Institute, University of Melbourne
Recording EEG during fMRI scanning permits the identification of hemodynamic changes associated with EEG events. However, subject motion within the MR scanner can cause unpredictable and frustrating artefacts on the EEG. Here we present a new method for recording motion in the MR scanner that is particularly suited for filtering motion artefacts from the EEG. We apply this filter to simulated and real EEG recordings and demonstrate that it can achieve a marked reduction in motion artefacts whilst preserving the underlying EEG signal.