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. Author manuscript; available in PMC: 2010 Mar 27.
Published in final edited form as: Neurosci Lett. 2009 Feb 10;453(1):31–35. doi: 10.1016/j.neulet.2009.02.007

Figure 1.

Figure 1

Cocaine-induced sensitization of locomotor response and 55 kHz-USVs (first 5 days, followed by 2 vehicle control days, and a final cocaine test for all animals). (A) A summary showing cocaine-induced locomotor sensitization. (B) A summary showing cocaine-induced sensitization of 55 kHz-USVs. (C) Normalized data showing the differential time courses of cocaine-induced locomotor sensitization and 55 kHz-USVs sensitization. (D) and (E) Summaries showing that the basal locomotor activity (D) and 55 kHz-USVs (E) were not significantly altered along the course of cocaine and vehicle exposure in non-treated animals.