“…An enhancement of dopaminergic transmission leads to an increased utilization and increased tissue levels of 5-HT in areas innervated by the dorsal raphe nucleus (Grabowska et al, 1973;Lee and Geyer, 1984;Lee, 1987). Both transmitter systems play an important role in the currently discussed models of schizophrenic disorders (Weil-Malherbe, 1967;Faurbye, 1968;Farley et al, 1980;Bleich et al, 1988;Owen and Simpson, 1994).…”