Data (N = 20)

Stimulant free (n = 8)

Stimulant abuse/ dependence
(n = 12)

p value

Basal Ganglia FA

0.24 (.0002)

0.17 (.0006)

p < .05*

Basal Ganglia MD 0.34 (.0004) 0.42 (.0007) p <.05*
Basal Ganglia Volume 6.7 mm3 (.08 mm3) 6.2 mm3 (1.1 mm3) p > .05
Hippocampal FA .08 (.02) 0.10 (.04) p > .05
Hippocampal MD 0.10 (.00006) 0.12 (.00010) p < .05*
Hippocampal Volume 4.6 mm3 (.05 mm3) 3.8mm3 (1.1 mm3) p >.05
* Statistically significant at p < .05
Table 2: Basal Ganglia and Hippocampus Fractional Anisotropy (FA), Mean Diffusivity (MD), and Volumetric.