A graph showing the effects of acute treatment with the crude extract of Erythrina falcata (CE) (A), buthanolic fraction (BuF), the subtraction from BuF (B) and the flavonoidic fraction (FfA and FfB) (C), as well as the negative (CS, Tween) and positive control (Diazepam) treatments, on the acquisition of fear memory as evaluated by one-trial, step-down inhibitory avoidance (IA). The values for step-down latency are expressed as the mean values (±SEM). *P < 0.05, **P < 0.01 and ***P < 0.001, according to ANOVA followed by the Bonferroni’s Multiple Comparison Test. ###
P < 0.001, comparasion between Training and Test, according to ANOVA followed by the Bonferroni’s Multiple Comparison Test. The drugs and vehicle were administered at 30 min prior to the training sessions using the flavonoidic fractions (FfA and FfB). No drugs were administered during the test.