Figure 9.

PSR causes long-lasting facilitation of AGR's excitatory input to the GI interneuron. A, A 10 s, 20 Hz psn stimulation (stim) elicited a slowly decaying membrane depolarization of an intracellularly recorded GI neuron. B, Superimposed (5 sweeps per panel) AGR spike-evoked EPSPs (from recording in A, indicated by numbers) showing a long-lasting psn-induced increase in their amplitude. Note that the intracellular traces were aligned horizontally to the same baseline for amplitude comparison. C, Group analysis from three trials showing a significant increase (**p < 0.01, Dunnett's ANOVA posttest) in GI EPSP amplitude that lasted >20 s after psn stimulation. This facilitating action of PSR on the AGR-to-GI synapse is shown (in bold) in the schematic at bottom right.