Figure 1.

Visual areas and whole-region correlation. (A) The dorsal and ventral aspects of visual areas V1–V3 were identified by reference to cortical surface topology. There are six “quarter area” cortical representations in each brain hemisphere, corresponding to the dorsal and ventral aspects of visual areas V1–V3. Note borders between visual regions are not included in the ROI definitions. (B) The across subject, average correlation matrix is shown for within hemisphere and between hemisphere region relations, in sighted (n = 22) and blind (n = 25) subjects. Within hemisphere, the cells on the positive diagonal represents the correlation of a region with itself and are marked with an “x” as these values are undefined in our analysis. (C) Average hierarchical, homotopic, and background regional correlations for the sighted and blind groups. The lines and asterisk indicate significant (p < 0.05) statistical comparisons between groups (combining the congenital and postnatally blind).