Figure 1

Cortical network construction.

(a) Unphysical connections, which are near in ambient space but excessively distant as measured on the cortical surface, are removed by exploiting the signed distance method³⁵ to highlight connections which correspond to crossing ambient space within the connection distance r. The exterior point p lying between the central node i (highlighted in red) and the target node j is marked with a star. Target nodes that remain connected to node i under this rule are shown as filled black circles. (b) A sample of the triangulated lattice defining the cortical surface, indicating the connectivity of a node (highlighted in red) in a network constructed via the process described in Network construction.