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. Author manuscript; available in PMC: 2014 Feb 1.
Published in final edited form as: Psychopharmacology (Berl). 2012 Sep 25;225(3):753–763. doi: 10.1007/s00213-012-2864-0

Fig. 2.

Fig. 2

Methamphetamine self-administration and ICSS by rats. Rats were daily allowed to receive ICSS at the lateral hypothalamus 1 h before and 3 h after intravenous methamphetamine self-administration with either 1- or 6-h access. The upper panels represent the data of methamphetamine self-administration during the first hour of each session (a) or during a whole session (b). c The data of ICSS measured 1 h before and 3 h after methamphetamine self-administration. d The correlation between the first-hour methamphetamine intake and the percent change of ICSS thresholds in rats with 6-h access. When error bars do not appear, they are within the symbols. *p<0.05, **p<0.01, ***p<0.001 compared with session 1. #p<0.05 compared with LgA 3 h after