Fig. 6. Bath application of GABA reveals cumulative effects of inhibition along branches. Examples from five experiments are shown. The most striking effect of increasing inhibition along a branch is demonstrated by A, but a general trend of increasing inhibition along extended branches or of greater inhibition for terminals at the end of a long branch far from the main axon can be seen in other preparations. In D and E, the standard inhibitor protocol of eight inhibitor stimuli and three excitor action potentials was performed for comparison.