Fig. 2.

Occipital cortical area scaling varies by rs6116869 genotype. (A) The slope of occipital cortical area scaling with total cortical area increases with the number of minor alleles. For each genotype, subjects are grouped into seven bins with an equal number of subjects in each bin (24, 26, and 8 subjects per bin for genotypes GG, GT, and TT, respectively). Binned averages ± SEM (dark) and regression lines fit to individual (light) measures are plotted. (B) Occipital proportion of cortex varies based on total cortical area and genotype. Subjects are binned as in A, and occipital proportions (occipital area divided by total cortical area) are plotted for individuals (light). Binned averages ± SEM (dark) are indicated.