Tract Rt/ Lt DTI metrics MMSE DS VS HVLT RFT TMT-A   Rt. FA -0.29 -0.261 -0.206 -0.475 -0.086 0.314   Rt. ADC -0.315 -0.289 -.771* -0.136 -.712* .741*   Lt. FA -0.156 -0.262 0.096 0.595 0.095 -0.571 FS Fiber Lt. ADC -0.503 -0.429 -0.506 0.024 -0.262 .872*   Rt. FA 0.126 0.234 0.543 0 0.321 -0.214   Rt. ADC -0.613 -0.667 -.898** -0.321 -0.679 0.692   Lt. FA .929** .887** 0.655 0.4 0.533 -0.5 SLF Lt. ADC -.770* -0.636 -0.511 -0.467 -0.35 0.452   Rt. FA 0.561 0.494 .911** 0.2 .850** -.905**   Rt. ADC -0.544 -0.251 -.741* -0.467 -.850** .912**   Lt. FA 0.381 0.048 0 0.333 0.452 0.036 ILF Lt. ADC -0.69 -0.524 -0.464 -0.31 -0.69 0.277

Table 3: Correlation coefficient between cognitive function and DTI parameters of subcortical fibers; DTI: diffusion tensor imaging; FS: Fronto-striatal; SLF: Superior longitudinal fasciculus; ILF: Inferior longitudinal fasciculus; MMSE: Mini-mental Status Examination; DS: Digit Span; VS: Visual Span; HVLT: Hopkins Verbal Learning Test; RFT: Rey-Osterrieth Figure Test; TMT-A: Trail Making Test type A; Lt.: Left; Rt.: Right; FA: Fractional Anisotrophy; ADC: Apparent Diffusion Coefficient; Pearson corr: Pearson correlation. * p < 0.05, ** p < 0.005