(A) Spectral power for (solid line) referential and (dashed line) corrected F7 and T7, (dashed–dotted line) reference signal, and (dotted line) bipolar F7–T7. (B) Absolute value of correlation for the (blue line) referential and (red line) corrected F7*Cz, F7*Pz, T7*F7, T7*Cz, and T7*Pz, and (dotted line) bipolar (F7–T7)*(Cz–Pz). (C) Mean phase coherence for the (solid line) referential and (dashed line) corrected F7*Cz, F7*Pz, T7*F7, T7*Cz, and T7*Pz, and (dotted line) bipolar (F7–T7)*(Cz–Pz). (D) MSC for the (solid line) referential and (dashed line) corrected F7*Cz, F7*Pz, T7*F7, T7*Cz, and T7*Pz, and (dotted line) bipolar (F7–T7)*(Cz–Pz).