Table 4.

Clusters showing significant correlations between cortical gray matter volume and visual field loss severity in the Retinitis Pigmentosa group.

Visual Parameter	Cluster	Number of voxels	Peak voxel t -value, p-value	Peak voxel MNI coordinates x, y, z (mm)	Cortical areas
Visual field’s diameter (degrees)	Cluster 1	1625	8.70, <0.00001	−6, −76, 2	Right and left cuneus; Right and left calcarine; Right and left lingual; Right and left precuneus
Visual field’s mean deficit (dB)	Cluster 1	185	5.99, <0.00001	−8, −78, 4	Right and left calcarine; Right and left lingual
	Cluster 2	340	5.90, <0.00001	0, −92, 20	Right and left cuneus; Right occipital superior gyrus

MNI = Montreal Neurological Institute coordinate system.