Overlap index between cytoarchitectonic ROIs and face-selective clusters. (A) Standard template of cytoarchitectonic ROIs including FG2 (purple), FG3 (blue), and FG4 (brown). (B) Definition and demonstration of overlap index. The purple and brown areas represent two anatomical ROIs. The areas with other colors represent face-selective clusters. C12 represents the number of clusters that overlap with both ROI1 and ROI2. C1 and C2 represent the number of clusters that overlap with ROI1 and ROI2, respectively. (C) Arbitrarily defined ROIs. We selected five locations (lines) on the ventral temporal lobe as the boundary between two arbitrarily defined ROIs. The ROI posterior to the boundary (purple) has the same span on the posterior/anterior axis as the FG2, while the ROI anterior to the boundary (brown) has the same span on the posterior/anterior axis as the FG4. (D) Comparison of mean overlap index between cytoarchitectonic ROIs and arbitrarily defined ROIs (see main text).
