Appendix B.

Examination of hemispheric asymmetries in the spatial distribution of network variants in an independent sample (MSC). (A) Network variant overlap across nine participants from the MSC. (B) Results of permutation testing for significance. True map indicates the correlation between variant overlap maps of the true left and right hemispheres. Randomized maps values indicate correlations between overlap maps obtained by randomly flipping the left and right hemispheres of participants 1000 times. (C) A difference map shows the regions in which the two hemispheres differ in the proportion of variant frequency. Warm colors indicate more variant overlap in left hemisphere, whereas cool colors indicate more variant overlap in right hemisphere. The spatial frequency of network variants differs significantly across the two hemispheres. Although this analysis was conducted on a substantially smaller number of participants, with very different spatial and temporal scanning parameters, the general distribution and differences across the hemispheres are recapitulated (compare this figure with Figure 3). The substantially smaller sample size likely accounts for sparser clusters.