Table 3.

In the slow-4 band (0.027–0.073 Hz), ALFF differences between the PHN and HC groups with Gaussian random field theory correction, voxel-level P < 0.01 and cluster-level P < 0.05.

Brain area	BA	Peak (MNI)			Peak voxels	T-value
		X	Y	Z
ON < HCs
Left insula	13	−39	−12	12	173	23.01
Left precuneus	31	−3	−54	33	111	12.67

ALFF, amplitude of low-frequency fluctuation; ON, optic neuritis; HCs, healthy controls; BA, Brodmann area; MNI, Montreal neurological institute.