Figure 1. Areas of gray matter atrophy derived from a voxel-based morphometric direct comparison between patients with p-TD (n = 29) and p-PIGD (n = 30) subtypes.

The results are superimposed in representative sagittal and axial sections of a customized gray matter template, at a threshold of p < 0.05, false discovery rate corrected. IFG = inferior frontal gyrus; IPL = inferior parietal lobe; PHG = parahippocampal gyrus; p-PIGD = predominately postural instability gait difficulty; p-TD = predominately tremor dominant; SMA = supplementary motor area.