The overall CSD component structure was highly comparable in controls and patients for both tasks, despite notable reductions of prominent CSD components in patients (such as the mid-frontal N2 sink, which was markedly reduced for words, or the lateral occipitoparietal P3 source across tasks). Importantly, eye movements were largely comparable across groups and tasks (see bipolar eye activity traces included in Figure 1 and 2), and evidently did not affect the corresponding ERPs, suggesting that blink activity was effectively removed by the spatial blink filter applied to the continuous EEG data.
