Figure 6.
Distribution of firing rates for a network of two populations in which excitatory and inhibitory neurons fire at different mean rates. Shown are three firing rate distributions calculated analytically from Equation 22. The blue one shows the case of identical firing rates in both populations of neurons. The red, black, and orange curves show how the distribution changes as the inhibitory cells fire at increasingly higher rates. The clearest effect is the broadening of the tail at high rates. In all cases, the mean and SD of the log rates have been fixed. The dotted curve is a lognormal distribution with the same mean and SD. Parameters: νextE = 23, 30.35, 32.9, 47.05 Hz; νextI = 23, 32.55, 35.95, 50.68 Hz; ΔC2 = 2000, 620, 50, 0; JEE = JIE = JextE = JextI = 0.0713, 0.0713, 0.0713, 0.048 mV; JII = JEI = −6JEE mV for the blue, red, black, and orange curves, respectively. The remaining parameters are the same: τE = τI = 5 ms; CextE = CextI = 1000.