Caudal to the injection site, all layers of the dorsal half of aPI contained a dense plexus of labeled axons and terminals that continued back into aPA to roughly 2mm behind bregma (levels +1.7 to -1.8, Fig. 13). Collator note: deep layers (V-VI) are labeled in GU and VISC, caudally and rostrally, respectively. See Fig. 13C-E, Swanson Atlas Levels 11-22

Labeled fibers and terminals were present also in layers I and VI of adjacent dAI and lateral orbital cortex (LO). Collator note: strong labeling of both AId and GU in the rostral part. See Fig. 15B, Swanson Atlas Level 10.

Moderate fiber labeling was present in layers I, V, and VI of the adjacent dPI at the level of the injection site, although this was much decreased in density from bregma to approximately 3 mm caudally. Collator note: Swanson Atlas Levels 14-19.