FOLH1 and Parkinson disease: Our main results were: (1) significant reduced PSMA degree centrality (DC) in PD patients, which was also correlated with H-Y stage; (2) the PSMA degree centrality reduction in PD could be attributed to reduced DC ratio in the visual, attention, somatomotor, limbic, frontoparietal and default mode network and (3) the significant correlation between PSMA DC and glucose metabolism in the healthy population disappeared in PD patients.