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. Author manuscript; available in PMC: 2016 Oct 1.
Published in final edited form as: Neuroscience. 2015 Aug 1;305:309–315. doi: 10.1016/j.neuroscience.2015.07.077

Figure 1. Self-administration of liquid sucrose in adolescent and adult rats.

Figure 1

A. Number of reinforcers (i.e. lever presses during the active period) earned by adolescent (n=32, white circles) and adult (n=52, black circles) rats. B. Number of active (circles) and inactive (triangles) lever presses during both the active and the time-out period. C. Number of lever presses during the 20s time-out period following sucrose delivery. D. Sucrose consumption normalized to body weight. *p<0.05 compared with adolescent rats. E. Postmortem verification of cannula placements of intracranial LY379268 infusions (white circle depicts 0.3 μg dose, black circle depicts 1.0 μg dose) and saline infusions (triangles). The numbers are in millimeters anterior from Bregma (Paxinos and Watson, 1998). F. Photomicrograph depicting the injection site in an adult saline rat.