Figure 2 Series of Axial Section Images (IMAGE) Radiological Society of North America Caption Series of axial section images show T1-weighted imaging-based voxel-based morphometry analysis of occipital cortex. Statistically significant reduction in clusters of gray matter concentration in Parkinson disease group compared with that in control subjects is shown. Only clusters comprising at least five suprathreshold voxels and involving at least one visual area were included in the analysis and are shown in the figure. To help visualization, shaded blue circles were added to highlight all clusters. 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.