Table 2.

Results of amplitude of low-frequency fluctuations (ALFF) analysis. Results reported for whole brain ALFF analysis with age and gender as covariates. Amy, amygdala; cLBP, chronic low back pain; dACC, dorsal anterior cingulate cortex; dlPFC, dorsolateral prefrontal cortex; HC, healthy control; Hip, hippocampal gyrus; L, left; MNI, Montreal Neurological Institute; mPFC, medial prefrontal cortex; PCC, posterior cingulate cortex; PCL, paracentral lobule; pHip, parahippocampal gyrus; PoG, postcentral gyrus; PrG, precentral gyrus; R, right; rACC, rostral anterior cingulate cortex; SMA, supplementary motor area; TPJ, temporoparietal junction.

Contrast	Regions	Peak MNI			Peak z-value	Voxels
		x	y	z
cLBP>HC	dACC_L	−6	36	27	3.97	1812
	PoG/PrG_L	−42	−6	35	3.90
	PoG/PrG_R (upper)	31	−6	52	3.73
	SMA/PCL	2	−9	70	3.34
	PoG/PrG_R (lower)	57	6	21	3.92	238
	rACC	0	42	−3	3.56	221
High pain>low pain	Insula_R	42	21	−9	5.11	599
	Hip/pHip/Amy_R	27	−6	−36	4.71
	Insula_L	−36	10	−14	4.33	54
	Hip/pHip_L	−27	−3	−27	3.97	36
	Thalamus_L	−6	−12	15	3.34	43
Low pain>high pain	TPJ_L	−39	−60	30	6.74	41
	mPFC/rACC	12	51	30	6.14	5366
	dlPFC_L	−36	33	27	5.02
	dlPFC_R	27	42	27	5.18
	Precuneus/PCC	−12	−57	60	4.59
	TPJ_R	54	−33	48	3.87