Y-maze testing was performed using an apparatus with three equal arms (30 cm length, 10 cm width, and 20 cm height), made of opaque acrylic (Plexiglas). A mouse was placed at the maze center under ambient illumination (20 lux) and allowed to explore the environment for 5 min. An arm entry was scored when the mouse entered the arm with all four paws. The total number of entries (N) and number of ‘correct’ triplets (M, consecutive choices of each of the three arms without re-entries) was evaluated. The alternation rate was computed according to the formula: R (%) = M*100/(N-2).
