Figure 6.

A line chart illustrating the proportional contributions of additive genetic (A), common environmental (C), and unique environmental (E) factors to the total gray matter volume across brain regions, as determined by the ACE model. Each line represents the contribution of a specific factor (A, C, or E) to the variance, with numerical annotations indicating precise proportional values. Regions with negligible common environmental effects (C) default to the AE model, underscoring the predominance of genetic and unique environmental influences. This visual representation emphasizes the significant genetic and environmental contributions to the variability of cortical gray matter volume across different regions.