Evaluation of performance monitoring ERPs through difficulty manipulation in a response-feedback paradigm.

In this study, we used a modified version of the flanker task, measuring the impact of task difficulty on the amplitudes of response-locked and feedback-locked performance monitoring ERPs in a single trial. We observed a functional differentiation between fronto-central (ERN/CRN and FRN) and centro-parietal (Pe/Pc and P300) components: the former seem to be only sensitive to accuracy, whereas the latter seem to be mainly modulated by task difficulty. The use of a surface Laplacian transformation, estimating current source density, on our data also supported an effect of difficulty on centro-parietal response-locked and feedback-locked ERPs. This technique allowed the spatial resolution to be improved and provided clarity, associated with the difficulty manipulation, and the activity of response-locked and feedback-locked performance monitoring ERPs.
PMID: 30300637 [PubMed - as supplied by publisher]

Source: Brain Research - October 6, 2018 Category: Neurology Authors: Somon B, Campagne A, Delorme A, Berberian B Tags: Brain Res Source Type: research