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. Author manuscript; available in PMC: 2011 Jan 1.
Published in final edited form as: Neurosci Lett. 2009 Oct 21;468(1):18–22. doi: 10.1016/j.neulet.2009.10.049

Figure 2.

Figure 2

(A) Percentage of time spent freezing during baseline (BL) and the average of the first 5 tone presentations (Tone) for each of the six on-drug extinction trial days. Each group represents the dose (mg/kg) of amphetamine given prior to each extinction trial. (B) Percentage of time spent freezing during the first tone block (first 5 tone presentations averaged) over baseline for each extinction day. (C) Difference between the percentages time spent freezing over baseline during the first tone block (first 5 tone presentations) on extinction Day 6 and extinction Day 1. All groups show evidence of extinction. Amphetamine did not affect between-trial or overall extinction. Each point represents the M ± SEM.