Fig. 3

Effects of oleuropein on percentage of time spent in target zone during the probe trials (a) and swimming speed (b) in MWM test. Oleuropein at the dosages of 10, 15, and 20 mg/kg significantly increased time spent in the target zone but there were no significant effects on swimming speed. Data are the mean ± SEM (n = 7). *p < 0.05 and **p < 0.01 indicate significant difference versus colchicine group, ^## p < 0.01 indicates significant difference versus control group, NS, there were no significant differences for swim speed between groups (p > 0.05)