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. Author manuscript; available in PMC: 2011 Sep 1.
Published in final edited form as: Neuroscience. 2010 Jun 10;169(3):1127–1135. doi: 10.1016/j.neuroscience.2010.06.006

Figure 2.

Figure 2

Extinction of drug-seeking behavior. (A) Data are the mean ± SEM of active lever presses during the 90 min extinction sessions for the indicated saline (n=8) and D-serine pre (n=8) and post (n=9) treatment groups. Active lever responding diminished over the five daily sessions. (B) Active lever presses from the fifth extinction session on protocol day 27. Data are the mean ± SEM of active lever presses during consecutive 10 min bins of the session.