Table 4 SP mean amplitudes during the congruent and incongruent conditions at three regions

Left frontal region

F7

2.72(0.89)

2.29(1.39)

2.45(1.07)

2.23(1.29)

FT7

2.09(0.97)

2.16(1.27)

1.97(0.83)

2.02(1.13)

Right frontal region

F8

2.83(1.07)

2.48(1.24)

2.43(0.96)

2.31(1.51)

FT8

2.32(0.88)

2.25(0.94)

1.91(0.67)

2.05(1.30)

Parietal region

P3

1.51(0.69)

1.60(1.01)

1.32(0.63)

1.36(0.98)

PZ

2.05(0.87)

2.28(1.14)

1.78(0.82)

1.95(1.13)

P4

1.63(0.85)

1.55(1.09)

1.35(0.71)

1.30(1.05)