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. Author manuscript; available in PMC: 2009 Apr 1.
Published in final edited form as: Prog Neuropsychopharmacol Biol Psychiatry. 2008 Jan 11;32(3):863–869. doi: 10.1016/j.pnpbp.2008.01.002

Figure 1.

Figure 1

Mean (+SEM) number of cocaine self-administered infusions over days are depicted in the main graph. Significant increases in number of self-administered cocaine infusions in the first hour and over the whole session were observed in the Coc6h group by the third day. * Represents significant difference from the first day of testing (p < 0.01). Mean (+SEM) number of cocaine self-administered infusions on the first (light bars) and tenth (dark bars) day of testing for the saline, coc1h, and coc6h (first hour and whole session) is depicted in the inset graph. * Represents significant difference between first and tenth day of testing (p < 0.001).