Figure 2. Session effects on response-synchronized ERPs.
Ne/ERN amplitudes were attenuated in the “on-medication” state (dark grey) compared to the “off-medication” state (light grey) in PD patients (right panels). HC (left panels) did not receive dopaminergic medication, and the ERP amplitudes did not differ between the sessions. (A) Response-synchronized grand average ERP activity following correct responses (Nc/CRN, dashed lines) and errors (Ne/ERN, solid lines). ERPs were low-pass filtered (12 Hz, 24 dB/oct) for display purposes only. (B) Topographical information for Nc/CRN and Ne/ERN (at grand average peak latency) for the two sessions in HC and PD.