Fig. 5.

Conditioned suppression to the flashing lights background stimulus in 0 s and 10 s conditioned groups after conditioning under saline (sal), SKF81297 or SCH23390 (SCH) infusions into anterior cingulate. The group sizes were 0 s-saline (n = 8), 0 s-SKF (n = 7) and 0 s-SCH (n = 7); 10 s-saline (n = 8), 10 s-SKF (n = 8) and 10 s-SCH (n = 7). (A) Mean suppression ratios. §Denotes a significant effect of infusion, as confirmed by Fischer's LSD test, p < 0.05 (Fig. 5A). (B) Mean number of licks in the first 1 min. Error bars represent the standard error of the mean. *Comparison lines are used to show difference in the effect of infusion by trace condition, as confirmed by Fischer's LSD test, p < 0.05 (Fig. 5B).