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. Author manuscript; available in PMC: 2014 Oct 1.
Published in final edited form as: J Neurosci Methods. 2013 Jul 4;219(1):155–161. doi: 10.1016/j.jneumeth.2013.06.006

Figure 5. 50–55 kHz FM USVs in High and Low USV Callers.

Figure 5

During access to self-administered cocaine, 50–55 kHz FM USVs were significantly greater in the High, compared to the Low USV Caller group. Data are daily mean (+SEM) 50–55 kHz USVs shown with a fourth degree polynomial fit. *, ** = significant difference between daily group means at p<0.05 and <0.01, respectively.