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. Author manuscript; available in PMC: 2010 Feb 22.
Published in final edited form as: Psychopharmacology (Berl). 2007 Jul 8;194(4):463–473. doi: 10.1007/s00213-007-0863-3

Fig. 1.

Fig. 1

Profiles of responses on the active (top) and inactive (below) levers. Note that the doses of nicotine in the figure legend are the total amount of nicotine rats received during the 1-h sessions. FR5:0.24 means that nicotine dose was switched to 0.24 mg kg−1 h−1 (0.03 mg/kg per infusion) in all nicotine-infused rats. See text for statistical details