Figure 8.

Schematic comparing the automated parcellation scheme produced by FreeSurfer (A) with the approximate observed extent of the cytoarchitectural region in serial Nissl sections (B). The anterior boundary of the region on the superior temporal gyrus corresponds closely to sulcal maps, while the posterior boundary was more variable across cases and often extended beyond the superior temporal gyrus into the supramarginal gyrus. Variation in the height of the posterior region is summarized in B. The color scale indicates the percent of cases that exhibited a posterior boundary extending to the respective height in the hemisphere.