Greedy navigation/routing plays an important role in geometric routing of networks
because of its locality and simplicity. This can operate in geometrically embedded
networks in a distributed manner, distances are calculated
based on coordinates of network nodes for choosing the next hop in the routing.
Based only on node coordinates in any metric space, the Greedy Navigational
Core (GNC) can be identified as the minimum set of links between these nodes
which provides 100% greedy navigability. In this paper we perform results on
structural greedy navigability as the level of presence of Greedy Navigational
Cores in structural networks of the Human Brain.