Figure 1.

Experimental design. Approximately 15 d after receiving H lesions, CA1 lesions, or sham surgeries, rats were trained in the delayed match-to-position (DMP) task, followed 2 d later by the watermaze (WM) task (top timeline). Different animals with the same lesions were trained on the WM task first, followed 2 d later by the DMP task (bottom timeline). The diagram at the bottom left shows the different platform locations used for the DMP task (where a new platform location was used each day). The diagram at the bottom right shows the single platform location used for the WM task.