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Exact neural mass model for synaptic-based working memory

Fig 7

Memory item switching with persistent activity.

The three columns (A-C) refer to three values of ΔT₂ for which we have a memory switching from one item to the other for a background current I_B = 2 supporting persistent state activity. (A) ΔT₂ = 70 ms; (B) ΔT₂ = 130 ms and (C) ΔT₂ = 850 ms. Profiles of the stimulation current for the second excitatory population (A1-C1). Population firing rates r_l(t) (A2-C2), normalized available resources (A3-C3) and normalized utilization factors (A4-C4) of the excitatory populations calculated from the simulations of the neural mass model. Final memory states as a function of the amplitude ΔI⁽²⁾ and width ΔT₂ of the stimulus to population two (D). In (D) the three letters A, B, C refer to the states examined in the corresponding columns. Other parameters as in Fig 3, apart for I_B = 2.

doi: https://doi.org/10.1371/journal.pcbi.1008533.g007