Coupling and robustness of intra-cortical vascular territories

► Brain's vascular territories overlap indicates large capacity for compensation. ► Distributed collateral supply is found for half of the cortical vascular network. ► Perfusion robustness is correlated with cortical depth. ► Arteriolar or venular territories are more coupled with their homologous neighbours. ► Arterio-venular coupling is not exclusive of neighbour territories.