Quantification of spike volley timing variance across trials.

<p>Results are shown for simulation 1. <b>A</b>, On each simulation trial <i>i</i>, the mean spike time <math><msubsup><mi>μ</mi><mi>p</mi><mi>i</mi></msubsup></math> is calculated for each pool <i>p</i>, and <math><msubsup><mi>v</mi><mi>p</mi><mrow><mi>t</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>l</mi><mi>s</mi></mrow></msubsup></math> is defined as the variance of <math><msubsup><mi>μ</mi><mi>p</mi><mi>i</mi></msubsup></math> across 100 trials. <b>B</b>, Cross-trial variance <math><msubsup><mi>v</mi><mi>p</mi><mrow><mi>t</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>l</mi><mi>s</mi></mrow></msubsup></math> is plotted against <i>p</i>, and error bars are plotted representing 5%–95% confidence intervals calculated by case resampling. With and without local feedback inhibition, <math><msubsup><mi>v</mi><mi>p</mi><mrow><mi>t</mi><mi>r</mi><mi>i</mi><mi>a</mi><mi>l</mi><mi>s</mi></mrow></msubsup></math> increases roughly linearly with <i>p</i>; however, its slope is significantly shallower when local feedback inhibition is introduced.