Fig. 4 | Nature Communications

Fig. 4

From: Intrinsic functional architecture of the non-human primate spinal cord derived from fMRI and electrophysiology

Fig. 4

Local dorsal-to-ventral correlation profile. a ROIs defined in one representative monkey on one side of the spinal cord. Mean time series of the dorsal region (red voxels) was used as a seed to compute mean Pearson’s cross-correlations with voxels from each depth (green voxels); depth numbers are indicated by the green numbers. Scale bar represents 1 mm. b An example of an observed U-shaped profile from SM-Roc. Asterisk (*) represents defined intermediate GM (I-GM) seeds based on functional and anatomical features; greatest difference of connectivity value to the dorsal horn seed. c Group-averaged aligned correlation profile based on each run’s anatomically functionally defined seed of the intermediate GM region for both left and right sides of the spinal cord. Error bars represent standard error of mean. The number of observations for each distance are indicated below each scatter circle. Data points representing four voxels away from I-GM were removed as they contain only five observations. Blue, red, and yellow shades represent estimated dorsal, intermediate, and ventral boundaries defined based on two-sided Mann–Whitney test comparisons (corrected for false discovery rate) relative to the defined I-GM seed; ^p < 0.000005; #p < 0.05; p < 0.1. Shades of overlaid colors—purple and orange—represent an estimated overlap of dorsal-IGM and ventral-IGM, respectively. Supplementary Tables 1 and 2 provide uncorrected and corrected p-values for Mann–Whitney Tests and r-values, respectively. d Group-averaged tSNR at different depths of the spinal cord used to compute (c)

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