Motion-related artefacts in EEG predict neuronally plausible patterns of activation in fMRI data

► We studied the effects of movement artefacts during simultaneous EEG and fMRI. ► Movement artefacts are evident in different EEG frequency bands. ► EEG movement artefacts cause spurious correlations with the T2*-weighted signal. ► Results show the need to develop techniques to detect and remove movement artefacts.