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. Author manuscript; available in PMC: 2015 Jul 27.
Published in final edited form as: Psychopharmacology (Berl). 2014 Mar 6;231(18):3745–3755. doi: 10.1007/s00213-014-3508-3

Fig. 2.

Fig. 2

Mean (±SEM) responses per session on the lever previously associated with the delivery of EtOH (a) or water (b) by P rats (n=6–7/group) microinjected with aCSF or 50, 100, or 200 µM nicotine into the pVTA. Asterisk (*) indicates that rats that administered aCSF or 50, 100, or 200 µM nicotine responded significantly (p<0.05) more on the EtOH lever during the first PSR session compared to extinction baseline levels. Double pound (##) indicates that 100 or 200 µM nicotine increased responding on the EtOH lever during the first PSR session compared to the aCSF and 50 µM nicotine (p<0.05)