Event-related potentials (ERP) as well as the individual and statistical topographical maps for the maximum significance of group effect following feedback presentation.

<p>Analysis indicated a significant main group effect ranging from 460-posterior channels. A. Topography of TFCE statistics for the main effect of group at 500 ms Red areas indicate higher statistical differences. B. ERP waveforms from three distinct regions of the scalp for the entire time range of the ERP. Black bars over the ERP indicate significant time points for this channel whereas yellow and red areas in the TFCE_F topography indicate significant channels. C. Individual topographical maps below indicate similar ERP topographies for all groups at 500 ms, however the Parkinson's group showed significantly lower amplitudes.