Fig 3. Learning phenotype of young and old Adrb2^flox GLAST-CreERT2 double mutants.

Escape latency (A) path length (B) and swimming speed (C) for 12 week old (n = 5–7) and aged (E, F, G respectively) animals (n = 4–6). Preference for quadrants left (L), right (R), opposite (O) of the target during the 30 second probe trial 2hours after the completion of the maze training are shown for the 12 week old (D) and aged animals (G). Graphs show mean +/- SD. The statistics for a difference between the genotypes (only) is shown. * = p<0.05, ** = p<0.01, *** = p<0.001.