Table 1.

Scheme of the behavioral experiments.

Mice were subjected to the experimental procedures that lasted 13 days. Adaptation phase was followed by the place and reversal learning protocols; white, tap water access, black, no access to bottles, pink, 10% sucrose solution access. During the training phases no more than 3 mice could drink from the same conditioning unit. During all phases of the training visits and nosepokes were registered in all four corners of the cage.