Approximation of the output synchrony in the limit of high input correlation.

<p><b>A</b> Output spike synchrony as a function of input correlation in the limit of high input correlation and strong synchrony . Data points and solid lines show results from simulations and theoretical approximation (11), respectively. Gray code corresponds to the four different mean membrane potential values as depicted in B, the input firing rate was , , and , correspondingly (from low to high ). The working point used in the previous sections corresponds to , . The inset shows the output firing rate at the four working points. <b>B</b> Output spike synchrony as a function of the actual common input fraction at the four working points. Dashed curves in A and B indicate .