Figure 5.
Brief stimulus trains cause an increase in GABA release. A brief stimulus train was given and 200 ms later a test pulse was applied to the same pathway (A). (B) The average response before and after the application of the GABAB receptor antagonist SCH50911 (thin line) is shown. (C) The time course of one experiment, in which the amplitude for the first response (•) and test response (○) are plotted. (D) Summary of five experiments is shown.