EEG-based study of error-related potentials in cerebellar regions

Error-Related Potential (ErrP) is an evoked potential detected in EEG when a person made an erroneous response or action. Past work has found ErrP in the frontal and parietal lobe which are related to cognitive functions. Recent study has found that the cerebellum, a structure that was thought to be involved in movement control, also participates in cognitive functions in assisting the frontal-parietal network. In the current study, we explored whether or not there is ErrP in the cerebellum when a person made an error. We had subjects performing Go/N o-Go task and recorded their EEG activity during the experiment. We found a prominent difference in EEG activity when the subject made an error compared with when the subject made a correct response. Our results support our prediction that there is ErrP existing in the cerebellum.