Figure 4. Examples of within-slice resting state functional connectivity across subjects.
These analyses were performed using AFNI's ‘InstaCorr’ with p < 0.001 and no minimum cluster size. In each panel, a seed voxel is marked with a green crosshair and resultant correlations are overlaid on the anatomical image. (A)–(F) Connectivity between ventral horns for subjects 1, 3, 8, 10, 11, and 13, respectively. (G)–(J) Connectivity between dorsal horns for subjects 5, 16, 18, and 22, respectively. (K and L) Less common correlations within gray matter. In (K) (subject 20), focal connectivity between ventral horns and with central gray matter. In (L) (subject 7), connectivity between ventral horns but also with the contralateral dorsal horn. At the single-subject level, there is some evidence for functional connectivity between ventral and dorsal horns, but such correlations are less common across slices and not statistically significant at the group level.