Transmission of temporally correlated spike trains through synapses with short-term depression
Fig 4
Occupancy and post-synaptic voltage statistics from a presynaptic pool of LIF neurons.
(A) Presynaptic rate (Eq 45) as a function of drive μ for three pairs of (vth − vre, σ) as marked leading to bursty (blue), intermediate (green) and regular (red) firing statistics. Lines of constant rate are at 5, 10 and 20Hz are marked (dotted lines). (B) Example presynaptic voltage time courses (Eq 44) with spikes marked (black) for the parameters marked with symbols in panel A (μ is varied so they are all at rate 5Hz). (C) The parameters vre and σ were co-varied linearly (with μ compensating so that rates were constant at 5, 10 and 20Hz: see dotted lines in panel A, with same color coding used) and the occupancy (Eq 9), post-synaptic voltage mean (Eq 24), standard deviation (from Eq 29) and CV plotted (against vth − vre). The behaviour seen is qualitatively the same as for the gamma-generated ISIs. In this figure N = 1000, n = 1 and vth = 10mV, with other parameters given in Table 1. The code used to generate this figure is provided in the Supporting Material.