Exact neural mass model for synaptic-based working memory
Fig 1
Comparison among neural mass and network models.
The results of the neural mass model (solid line) are compared with the network simulations (shaded lines) for a single excitatory population with μ-STP (column A) and with m-STP (column B). The corresponding raster plots for a subset of 2000 neurons are reported in (A1-B1), the profiles of the stimulation current IS(t) in (A2-B2), the instantaneous population firing rates r(t) in (A3-B3), the available synaptic resources x(t) in (A4-B4), and the utilization factors u(t) in (A5-B5). The variables of the neural mass model are initialized to values coinciding with those of the corresponding network simulations. Since the numerical experiments for the single excitatory population with μ-STP (column A) and with m-STP (column B) are independent, the initial values of the synaptic variables do not coincide, even though a similar dynamical evolution is observable in both cases. Simulation parameters are ms, H = 0, Δ = 0.25, J = 15, IB = −1 and network size N = 200, 000.