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. Author manuscript; available in PMC: 2009 Apr 28.
Published in final edited form as: Pharmacol Biochem Behav. 2008 Jan 17;89(3):345–351. doi: 10.1016/j.pbb.2008.01.006

Fig. 1.

Fig. 1

Effects of systemic injections of the adenosine A2A agonist CGS 21680 on lever pressing performance (experiment 1). Rats received treatment with vehicle or various doses of CGS 21680. Mean (± SEM) number of lever presses (FR 5 schedule) during the 30 min session are shown. (* p<0.05, different from vehicle).