Figure 4.

Number of active lever presses during the final two days of sucrose self-administration (SA), extinction training (Ext), and during reinstatement test sessions in animals with guide cannula aimed at the NAc (A) or BLA (B). The selective mGluR5 antagonist MTEP (3 μg/μl) or vehicle (aCSF) was infused 10 min prior to reinstatement testing in a counterbalanced randomized order. Data represent mean (± SEM) responses of n=5 rats per group. * indicates p<0.05 vs. values for Ext and MTEP.