A. Infusion coordinates for all sites (PS = posterior striatum; AMS = anteromedial striatum; NACcl = nucleus accumbens lateral core; NACcm = nucleus accumbens medial core; NACs = nucleus accumbens shell). Coordinates were: PS (toothbar +5.0): AP+0.4, L±4.0, DV-4.7; AMS (toothbar -3.3): AP+1.2, L±1.7, DV-5.5; NACcl (toothbar -3.3): AP+1.2, L±2.3, DV-7.0; NACcm (toothbar -3.3): AP+1.2, L±1.6, DV-7.5; NACs (toothbar -3.3): AP+1.2, L±0.8, DV-7.2. B. Distribution of injector placements for the sites that supported a significant reduction in PPI: the NACcl and NACcm. Bilateral placements for any given rat are collapsed onto one hemisphere for this plot. C. Photomicrograph of examples of injector tip placements in NACcl and NACcm from rats in these studies (ac = anterior commissure).