Significant associations were found between N1 sink and N1 ERS (135 and 130–1, each factor pooled across condition) for both patients (r = −0.75, p < 0.0001) and controls (r = −0.69, p < 0.001), confirming that greater N1 sink was linked to increased N1 ERS. For patients, greater FRN (505) activity was associated with increased alpha ERD (610–9) for targets, as indicated by a positive correlation for the mid-frontal sink (r = 0.55, p = 0.008) and a negative correlation for the centro-parietal source (r = −0.44, p = 0.04); thus, both increases in mid-frontal sink and centroparietal sources (i.e., at either end of a sink-source dipole underlying FRN) were linked to greater alpha ERD.
