Table 3.

Difference of PCC FC in patients between HC group, PD‐NCI group, PD‐MCI group, and PDD group, and the correlation between PCC connectivity and MoCA scores in PD‐MCI group and PD‐NCI group

	Brain region (AAL)	Cluster size (voxels)	Coordinates MNI			T value
			X	Y	Z
A
PD‐NCI group vs HC group	Left Superior Frontal Gyrus	54	−27	63	9	−3.3465
	Right Angular Gyrus	52	51	−48	42	−5.2663
	Left Superior Parietal Gyrus	36	−39	−63	60	−5.1522
B
PD‐MCI group vs PD‐NCI group	Left Middle Frontal Gyrus	252	−39	21	45	4.3907
	Right Middle Frontal Gyrus	87	39	24	48	5.3799
	Medial Superior Frontal Gyrus	43	3	45	45	3.9279
	Left Middle Temporal Gyrus	63	−57	−24	−15	3.7534
	Left Precuneus	105	−6	−63	30	4.7026
	Posterior Lobe of Cerebellum	46	−12	−57	−42	4.1632
C
PDD group vs PD‐NCI group	Anterior cingulate and paracingulate gyri	32	0	48	3	−4.4104
	Left Middle frontal gyrus	101	−30	18	63	5.9691
	Superior Frontal Gyrus	68	−30	18	63	5.9691
D
PDD group vs PD‐MCI group	Left caudate	36	−15	15	3	−6.1061
	Right thalamus	24	15	−27	6	−4.6346
	Precuneus	9	15	−27	6	−4.6346
	Middle Frontal Gyrus	110	42	27	30	−4.0794
	Right Angular Gyrus	85	45	−60	39	−5.2748
E
Correlation between PCC connectivity and MoCA scores in PD‐MCI group and PD‐NCI group	Primary visual cortex	61	−3	−96	6	−0.5984
	Cuneus	54	6	36	3	−0.5710
	Lingual gyrus	174	−45	−81	9	−0.5271
	Precuneus	44	12	−54	69	−0.7692
	Angular Gyrus	35	51	−54	48	0.4851
	Posterior cerebellum	114	15	−69	−30	0.7561