Fig. 1

Spatial alternation test using a T-maze. Normal 0.9 % NaCl injection + oral administration of 0.5 % CMC; Control Aβ_25–35 injection + oral administration of 0.5 % CMC; Q Aβ_25–35 injection + oral administration of quercetin (30 mg/kg/day); Q3G Aβ_25–35 injection + oral administration of quercetin-3-β-D-glucoside (30 mg/kg/day). Values are mean ± SD. ^{a, b}Means with different letters indicate significant differences (P < 0.05) by Duncan’s multiple range test. *The space perceptive abilities for deciding between old and new routes were significantly different as determined by Student’s t-test (P < 0.05)