Fig. 1.

Responses at a previously active and inactive lever in non-dependent and post-dependent rats. SA,Ethanol-reinforced responses at the end of self-administration training; EXT, responses during the final three extinction sessions; Reinstatement, responses after intermittent footshock (Stress), during response-contingent presentation of an ethanol-associated conditioned stimulus (EtOH CS), and response-contingent presentation of the EtOH CS after footshock (Stress + EtOH CS). *p < 0.05; **p < 0.01 different from extinction; +p < 0.05; ++p < 0.01 different from Stress and EtOH CS; #p < 0.05 differences between non-dependent and post-dependent rats.