Habituation on (A) the open field and (B) inhibitory avoidance. Animals were submitted to sham-operated and CLP treated or not treated with anti-CD40 (100 µg/kg). Data are presented as mean ± SEM to open field and as median and interquartile ranges to inhibitory avoidance, n = 10 rats per group. *Different training (p < 0.05). sec, Seconds.