Figure 3 shows the delineation of early visual cortical areas. Panel A shows areas V1, V2, V3, and V4 overlaid on a folding map. Panels B and C show myelin and cortical thickness maps. Panel D shows the foveal vs peripheral eccentricity contrast. Panel E shows retinotopic parcels from (Abdollahi et al., 2014). There is notable agreement between these definitions in mid-eccentricity regions, but better coverage of peripheral regions in the present study and there are some differences in foveal regions and V4. Panels F, G, and H show the horizontal vs vertical meridian contrast, the gradient magnitude of the contrast, and the visuotopic sign produced by taking the dot product of the gradient vector with a vector that points towards V1 (see Supplementary Methods #4.4). Panel I shows area 18 (V2) from post-mortem cytoarchitecture registered across subjects on the surface (Fischl et al., 2008). Panels J, K, and L show the visuotopic maps for the lower vs upper vertical meridian contrast. Note that unlike the horizontal vs vertical meridian contrast, in the lower vs upper field contrast, the visuotopic signs are opposite for superior and inferior portions of each area. Panels M, N, O, and P show the working memory BODY-AVG, FACE-AVG, PLACE-AVG, and TOOL-AVG contrasts.
Surface Mesh:32k fs LR, Registration:MSMAll, Species:Human, Modality:T1-weighted, Modality:T2-weighted, Modality:Myelin Map