Separating distinct aspects of the voluntary selection between response alternatives: N2- and P3-related BOLD responses

Probing the cortical network underlying the psychological refractory period: A combined EEG–fMRI study

“…Although we observed significant correlations between trial-bytrial ERP variations and simultaneously recorded fMRI signals in predefined regions of interest, the fact that we did not find any significant regions by a whole-brain EEG-informed analysis, as for example in studies of the error-related negativity (Debener et al, 2005) or the go/nogo paradigm (Karch et al, 2010), is disappointing. The reasons could be twofold.…”

An ERP study of target competition: Individual differences in functional impulsive behavior

“…N2 amplitude is larger in trials consisting of highly conflicting task-relevant stimuli compared to low-conflict trials (e.g., Kopp et al, 1996;Yeung et al, 2004). Karch et al (2010) found N2-like activity in medial frontal brain areas for both, trials on which participants were free to respond (as opposed to not to respond at all) and trials requiring a response to conflicting stimuli. The fact that both, voluntary responding and multiple targets imply an element of choice suggests that target competition may be linked to N2-related cognitive control.…”

Neural correlates of ideomotor effect anticipations

“…An R-E compatibility effect was present for endogenously selected actions but not for exogenously selected actions, preparing the ground for the corresponding fMRI analysis. endogenous action control (Jahanshahi et al, 1995;Karch et al, 2010;Rowe et al, 2010). This network included the rostral cingulate zone, lateral prefrontal areas, insular cortex as well as large parts of parietal cortex (Fig.…”