Series of transverse sections through the rostral basal ganglia comparing immunostaining patterns of ChAT (A), VIP (B), ENK (C), TH(D), CCK (F), NPY G), GAD (H), and SP (I) in different compartments of the striatum and ventral pallidum. These are illustrated in a schematic diagram (E). The series is arranged from rostral (A) to caudal (I). Note that two patches of neurons, the MI (open arrowhead) and islands of cells within the LPS (open arrows) express different neurochemical patterns than the adjacent striatal matrix. Rostrocaudal level is approximately A13.50.