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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. 3.

Fig. 3

ICSS in rats during protracted withdrawal from methamphetamine self-administration with 6-h access. The data are expressed as the percentage of the ICSS threshold measured 1 h before the first exposure to 6-h access of methamphetamine self-administration (LgA session1 ICSS threshold). After 11 days of methamphetamine self-administration with 6-h access, rats were withdrawn from methamphetamine self-administration and allowed to receive ICSS once a day. *p<0.05, **p<0.01 compared with LgA session1 ICSS threshold