In this study, correlation calculations were also performed between bilateral regions of PFC region (between left vs. right PFC region) for each group. In the results, we can observe that the value of correlation coefficients of ΔHb is lower than ΔHbO2 and ΔtHb especially in male group. In the results of bilateral correlation analysis of ΔHbO2 and ΔtHb (Figs. 5(a), 5(e) and 5(b), 5(f)), the male group shows the stronger connections in the dorsolateral PFC regions (BA 10, BA 46, and BA 9) than inferior PFC regions (BA 44, and BA 45 - Broca's area). Conversely, the female group shows the stronger connections in the inferior PFC regions than dorsolateral PFC regions. Additionally, the mean variations of intensity in PFC of male group are stronger than female group in the resting-state condition. Overall, this result indicates that the bilateral brain functional connectivity is strong in PFC regions of both male and female groups.
