Littermate controls were used in all experiments. GluR-B+/+ mice were used as controls in the task described in Figure 1. GluR-B+/2lox and GluR-B2lox/2lox (both negative for TgCre4) mice were used as controls in experiments described in Figures 2, 4, and 6. For the GluR-BRescue experiments (Figure 6), controls positive for either TgCN12-itTA or TgOCN1 in a GluR-B+/2lox and GluR-B2lox/2lox (both negative for TgCre4) background were used.