Fig. 2.
(a) A diagram presenting a family of intracortical surface meshes, where the heat scale represents the cortical depth; the mesh topology (i.e., both the numbers of vertices and edges and the connections between the vertices) is the same for all depths, so that a given vertex index in one mesh corresponds to the same vertex index across all the meshes. (b) A schematic illustration of steerable smoothing kernels tracking the cortical GM folds: 1D radial or “columnar”, 2D tangential or “laminar”, and 3D or “intracortical” (IC) extending from WM surface (IC-wm) and from midgray depth (IC-mid), and over all cortical depths (IC-all); columnar smoothing is enacted by an average of the data across the corresponding vertices.