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. 2014 Dec 1;8:157. doi: 10.3389/fncom.2014.00157

Figure 5.

Figure 5

Feedforward inhibition causes prolonged inter-spike intervals in the target neuron. (A) 30 membrane potential traces overlaid with first spike aligned from a single isolated PKJ. Spikes are artificially drawn. The variable ISI can be seen. (B) A model MLI was then synaptically connected to the PKJ providing feedforward inhibition and caused to fire 12 ms (marked by the black arrowhead) after the first PKJ spike. 30 membrane potential traces with the first spike aligned from the PKJ are shown. The effect of the IPSC (4 nS peak in this simulation) can be shown to increase the average ISI. (C) Histograms of ISIs in the case without feedforward inhibition (as in A) (darker shade, left histogram) and with feedforward inhibition (as in B) (lighter shade, right histogram). (D) The relationship between IPSC and ISI can be seen by varying the synaptic conductance randomly in separate trials and measuring the resulting ISI.