Description:
<jats:p> Abstract: The present study investigates differences in error processing between Parkinson's disease patients (PD) and controls. More specifically, we wanted to know whether patients with PD showed similar differences in the late error-specific ERP component, the error positivity (Pe), as we recently found for the error negativity (Ne/ERN) - a component most probably mediated by the dopaminergic (DA) system. When using the same tasks as in the preceding study we consistently found no Pe differences for patients compared to controls, which is in sharp contrast to the reduced Ne for the patients in all tasks, as reported earlier. This demonstrates again the differential variation of Ne and Pe and suggests that the Pe is not dependent on the DA system. </jats:p>