Fig. 4

Changes in beta FC strength (eyes-closed) between flight conditions. (a) Statistical comparison between conditions. The bar graph depicts the mean ± SD of the beta band FC strength for each flight condition (*p < 0.05, **p < 0.01, ***p < 0.001). (b–d) Brain figures in the dashed boxes represent the areas with higher statistical FC changes in the beta band comparing areas between (b) pre-flight versus in-flight conditions, (c) post-flight versus in-flight conditions, (d) pre-flight versus post-flight conditions. The colorbar is displayed as a family-wise corrected significance level of q value > 5, corresponding with a minimum p value of 0.05. The q statistic value was obtained from the results of the post-hoc Tuckey test of the multiple comparison corrections. Thus, the darker the red color represents brain regions with higher statistical power. The five subjects are mentioned by the respective code letter under each bar. Brain figures were generated using ‘Image Processing Toolbox’ and ‘Medical Imaging Toolbox’ from Matlab R2023b (version 23.2, https://www.mathworks.com/products/matlab.html).