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Mean ± SD of step-trough latency (s), 24 h after shock delivery to paws in shuttle box (as passive avoidance memory) of sham ischemic (Sh), ischemic (I), I+P100, I+P200, I+P400, I+P800 and sham treated (I+Veh). Data were analyzed by oneway ANOVA followed by LSD post hoc test. Levels of significance are indicated by symbols: $ P < 0.05, ** P < 0.01, *** P < 0.001. Stars symbols indicate difference with SI and $ for difference with I group.
