Effect of initial values on dynamics of the grid.

<p>Histogram of activity survival durations for 1000 trials of grid simulations with different initial values of the second adaptation kernel (<i>γ</i>₂). For each trial we took the initial values shown in <a href="http://www.ploscompbiol.org/article/info:doi/10.1371/journal.pcbi.1006216#pcbi.1006216.g006" target="_blank">Fig 6D</a> (right) and shuffled the columns. In ∼23% of trials the activity ceases before reaching all columns. In ∼35% of trials we observed that the activity spreads instead of circulating. In the remaining trials, we observed circulation with different patterns and durations depending on the path carved by the choice of initial values. The durations longer than 1000ms are clamped to 1000ms for better visibility.