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. Author manuscript; available in PMC: 2009 Jan 1.
Published in final edited form as: Biochem Pharmacol. 2007 Jun 30;75(1):218–265. doi: 10.1016/j.bcp.2007.06.039

Fig. 1.

Fig. 1

Graph showing the increasing number of publications on the topic of glutamate and addiction over the past 20 years. Two separate PubMed searches were performed in April 2007, one using “drug addiction” and “glutamate” as key words (open circles) and the other using “alcoholism” and “glutamate” as key words (filled circles). The resulting number of publications (including review articles and commentaries) are plotted by year for 1987 to 2006.