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Total time, immobility time, and execution time spent in the radial maze in young and old rats after vehicle and MEL administration. The stars (∗) mark the significance of the differences within animals of the same age and the cross (†) marks the differences between ages. ∗∗∗ and ††† P < 0.001; ∗∗ and †† P < 0.01; † and ∗ P < 0.05.
