Figure 6.

Responses on the active and inactive lever by male Wistar rats for the self-infusion of 200 mg% EtOH for seven consecutive sessions (a, top); 200 mg% EtOH for the first four sessions and 200 mg% EtOH plus 1 or 10μm quinpirole (Quin) in sessions 5 and 6 (b, middle and bottom); and 200 mg% EtOH again in session seven directly into the posterior VTA (c). The asterisks indicate responses on the active lever were significantly higher (p < 0.05) than responses on the inactive lever for that session. Data are the means ± SEM; n = 6–8/group.