Figure 9 shows the significantly different channels based on two-sample t-test calculated from spectrogram data between male and female groups. The Ch. 7, 8, 19, 29, 30, 38 and 39 of left-side PFC and Ch. 13, 23, 34 and 45 of right-side PFC are significantly different with p < 0.001. It must be noted that the inferior PFC regions (BA 44 and BA 45) of both left-side and right-side are demonstrated significant difference.
