Systematic analysis of the effect of the pattern sparsity on sequence memory storage.

Left: The average PCI (indicated by the color scale) in CA3-CA3 projections for different DDN networks as a function of the mixing parameter α and the sparseness of the patterns a (see Fig 1). Sixteen sequences were stored. Based on our criteria, the CA3 network is able to successfully store and retrieve memory sequences when PCI > 0. PCI values are averaged across 20 repetition of the simulation. Right: The average proportion of large correlations between pairs of stored patterns, 〈ξCA3〉. The patterns in both panels confirm that PCI memory retrieval is only possible, i.e., PCI > 0, if 〈ξCA3〉 is near zero.