TABLE 3.

Frequency-specific gFCD alternations in the SA group.

Frequency band	Contrast	Cluster regions	L/R	Cluster size	MNI coordinates			Z-score
					x	y	z
Full low frequency	Post > Pre	IFG	R	26	54	27	24	3.66
	Pre > Post	AG	L	26	–51	–69	24	3.33
Slow-5	Post > Pre	–
	Pre > Post	HIP	L	34	–24	–30	–18	3.27
Slow-4	Post > Pre	–
	Pre > Post	–
Slow-3	Post > Pre	–
	Pre > Post	mPFC	L/R	95	–3	51	39	3.66

Voxel level, p < 0.005, cluster level, p < 0.05, cluster size > 20 voxels; the small volume correction was applied in case the pain-related brain regions (cluster size less than or equal to 20) were not significant by FWE test. Abbreviations: IFG, Inferior Frontal Gyrus; AG, Angular Gyrus; HIP, Hippocampus; mPFC, Medial Prefrontal Cortex.