p364fig10.14 This figure emphasizes how preattentive intracortical groupings and top-down intercortical attention share the same modulatory on-center, off-surround layer 4-to-6 decision circuit.<BR>||  Explanation: grouping and attention share the same modulatory decision circuit.  Layer 6-6-4-2/3 pathway shown; also a layer 6-1-2/3 path.  intercortical attention, both act via a modulatory on-center off-surround decision circuit, intracortical feedback from groupings