Figure 3. Comparison between late-onset PD patients with diphasic dyskinesia and late-onset PD patients without dyskinesia. Compared with late-onset PD patients without dyskinesia, late-onset PD patients with diphasic dyskinesia showed higher GM volumes in left precentral gyrus (Cluster size: 189 mm3). Correction for multiple comparisons (family-wise error rate (FWE), P < 0.05) was used to threshold the analysis. Abbreviations: PD, Parkinson’s disease; GM, gray matter.