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. Author manuscript; available in PMC: 2013 Apr 23.
Published in final edited form as: J Neurophysiol. 2006 Nov 22;97(1):883–891. doi: 10.1152/jn.00963.2006

FIG. 2.

FIG. 2

U69593 and dynorphin inhibit the D2 IPSC in substantia nigra compacta (SNc) cells by a presynaptic mechanism. A: U69593 (200 nM) inhibited D2 IPSCs but had no effect on currents generated by the iontophoretic application of dopamine in SNc cells. B: Dyn (200 nM) inhibited both IPSCs but caused a small potentiation of the iontophoretic current in SNc cells. C and D: summary of the effects of U69593 and dynorphin on SNc dopamine cells. E and F: Dyn produces a greater whole cell current than U69593 in SNc dopamine cells.