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. Author manuscript; available in PMC: 2011 Apr 7.
Published in final edited form as: Behav Pharmacol. 2010 May;21(3):182–193. doi: 10.1097/FBP.0b013e32833a5c9e

Figure 7. Effect of omitting the nicotine reinforcer on responding during the nicotine and sucrose components.

Figure 7

Data are expressed as mean (± SEM; N=4) total number of responses during the nicotine components (Panel A) and sucrose components (Panel B) during the last session of nicotine self-administration (baseline), as well as the average of responding during nicotine extinction sessions 1–4, 5–7, and 8–10. * denotes a significant difference from responding on the sucrose lever, p<.05.