Figure 7.

Bursting produced by the activity dependent slow modulation of excitatory and inhibitory synaptic efficacy according to SS2 [equation (12)]. Left panel shows h_e (solid black line) and normalized excitatory synaptic efficacy c_e ≡ Γ_el/${\Gamma }_{el}^0$ (solid red line) as a function of time. The left hand panel shows the phase relationship between normalized excitatory and inhibitory (c_i ≡ Γ_il/${\Gamma }_{il}^0$) synaptic efficacies. Parameters: κ_e = 0.2 mV⁻¹, κ_i = 0.1 mV⁻¹, ε_ii = 1.8, ε_ie = 1.5.