Fig. 5.

Overlap and mismatch of VisualMotor anti-correlations and Breathing anti-correlations. A mask of the significantly anti-correlated voxels in each subject's Breathing data was dilated to account for minor misalignment between datasets. Voxels that were significantly anti-correlated in the VisualMotor data were classified as“overlapping” or“other.” The activation mask from the Localizer scan is included as a reference. Anti-correlations that showed overlap between the two datasets were observed in semi-contiguous groups of voxels (i.e., at the edges of ventricles) as well as more point-like clusters (e.g., near the brain surface). Other (non-overlapping) anti-correlations present in the VisualMotor data were also observed; Subjects 5, 6, and 7 exhibited non-overlapping anti-correlations in areas contralateral to the region of motor activation in the Localizer scan.