Figure 4.

Decreased spontaneous activity in axon terminals of Area X pallidal neurons in DLM after Area X inactivation by GABA infusion. A, The raster shows the responses of a single pallidal axon terminal to GABA infused into Area X for 45 s (vertical bar). A raw trace of the pallidal axon activity from the trial indicated by the asterisk on the right side of the raster is shown at the bottom. Overlaid spike waveforms are shown in the inset; calibration: 0.2 ms. B, Mean firing rates before GABA infusion were plotted against mean firing rates after GABA infusion for pallidal axon activity. Conventions are as in Figure 3C. C, Recovery of firing rate changes in pallidal axon terminals that exhibited significant decreased activity after GABA infusion. Conventions are as in Figure 3D.