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Effects of MDA administration on extracellular dopamine (DA) and 5-HT concentrations, and horizontal ambulation (Amb), in rats undergoing microdialysis in nucleus accumbens. Rats received i.v. drug injections at t=0 and 60 min, at the doses indicated, as shown by arrows. Data are mean +/− SEM for N=7 rats/group, expressed as percent of pre-injection basal values for each endpoint. * = significant effect compared to saline at corresponding time point.
