A, Relationship between the aggressive response ratio (Aggressive Ratio) and FDOPA-Vd (ml g−1; index of dopamine storage capacity) in NC, thalamus, and midbrain; correlation in thalamus reached significance (r = −0.497, p = 0.022; n = 21; two-tailed rank-order correlation). B, Relationship between Aggressive Ratio and FDOPA-K (ml g−1 min−1; index of dopamine synthesis capacity). Significant correlations in the NC (r = −0.444, p = 0.044; n = 21; two-tailed rank-order correlation) and midbrain (r = −0.640, p = 0.0002; n = 21; two-tailed rank-order correlation). For illustration, the solid line represents the linear regression line.