Figure 5.

(A) Comparison of the VX group with the IC group: At the coronal plane equivalent to −2.3 mm from bregma as seen in Zilles (1985), there was no significant difference between the VX and IC groups in the ROI. There was no effect of litter, position, and no interactions. (B) At the coronal plane equivalent to −1.8 mm from bregma (Zilles 1985), there was no effect of group and no interactions, but thickness varied by position over the ROI (p < .001). (C) At the coronal plane equivalent to that of −0.8 mm from bregma (Zilles 1985), the thickness of the medial ROI was greater in the VX group than the IC group (p < .025). Exercise did not alter the thickness of the lateral ROI. In both ROIs, thickness varied over position (p < .01). (D) At the coronal plane equivalent to that of −0.3 mm from bregma (Zilles 1985), there was a trend for the VX group to have thicker cortices at the medial ROI than the IC group (p = .027). Exercise did not alter the thickness of the lateral ROI. There was no effect of position in either ROI.