Figure 2. Comparison between early-onset PD patients with diphasic dyskinesia and HCs. Compared with HCs, early-onset PD patients with diphasic dyskinesia showed higher GM volumes in right precentral gyrus (Cluster size: 891 mm3). Correction for multiple comparisons (family-wise error rate (FWE), P < 0.05) was used to threshold the analysis. Abbreviations: PD, Parkinson’s disease; HC, Healthy control; GM, gray matter.