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. 2017 Mar 13;13(3):e1005437. doi: 10.1371/journal.pcbi.1005437

Fig 7. SSA is limited to a narrow region in parameter space.

Fig 7

(A) CSI as a function of amplitude (A) and ISI (using U = 0.5, τrec = 800 ms). Here and in the other panels, an arrow marks the transition from the No-PS regime to the Selective, Periodic and finally the Reliable regime (Rel.), delineated by the black lines. (B) CSI in a network with the same parameters as in (A), but with homogeneous columns (all input-receiving neurons in each column have the same best frequency). Heterogeneity of the tuning curves acted to shift and slightly expand the range of parameters that showed SSA, and specifically its low-A branch. (C) CSI as a function of synaptic parameters U and τrec (A = 5 spikes/s, ISI = 350 ms). On this plane there was also a Bursting regime (Burst.), composed of networks that generate spontaneous PSs, crossing the Reliable regime. (D) CSI in a network with the same parameters as in (A), but without thalamocortical depression. Thalamocortical depression thus extended the range of parameters that showed SSA. In all protocols, P = 10% and Δf = 2. Default values were A = 5 spikes/s, ISI = 350 ms, U = 0.5, τrec = 800 ms.