Figure 2 (IMAGE) Radiological Society of North America Caption MR images show microstructural white matter damage (tract-based spatial statistics). Areas of decreased fractional anisotropy (FA) (red) and increased mean diffusivity (blue) overlapped on the overall FA skeleton (green) in groups of patients with Parkinson disease compared with healthy control subjects (P < .05 corrected for multiple comparisons). Credit Radiological Society of North America Usage Restrictions May use with credit. License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.