Fig. 7.
ACh-elicited currents in Gaba neurons of the SN and VTA. A1, In the Gaba-Ac subclass of the VTA, ACh elicits current waveforms characterized by a sharp peak, exponential decay, and small amplitude. A2, In the Gaba-RS subclass of the SNr, the ACh current waveform is often slower and of larger amplitude. B, ACh elicited current amplitude plotted versus corresponding rise time in Gaba-Ac (○) and Gaba-RS neurons (●); mean ACh-elicited current amplitude versus mean rise time in DA neurons was also reported (double triangle).