Figure 6From: Presynaptic action of neurotensin on dopamine release through inhibition of D2 receptor functionReleasable pools of DA are not depleted in the presence of sulpiride. A) The graphs represent the average amplitude and kinetics of train pulse-evoked DA levels measured in the presence of sulpiride (5 μM) alone (+74% above control, n = 7) or sulpiride in the presence of an elevated concentration of extracellular Ca2+ (3.4 mM) (+ 84% above sulpiride alone, n = 7). B) Summary graph showing the time course of the effect of an elevation of extracellular Ca2+ to 3.4 mM (for a total of 8 min) with pre-applied sulpiride (5 μM) in the bath (n = 7).Back to article page