Fig. 3.

Effects of dose of fluoxetine on freezing behavior immediately before (pre-shock) and immediately following (representing fear conditioned to contextual or discrete cues in the shuttle box) three foot shocks in a shuttle box. Drugs were administered 1 h prior to behavioral testing. Data are presented as a 2-min blocks of freezing and b the mean percent freezing for the entire 20-min observation period. Data are means ± SEM. Asterisks p<0.05 relative to saline and 2.5 mg/kg fluoxetine groups. Group sizes are shown within the bars