Figure 3. Quantification of variability in the Rb model and its dependence on the number of channels simulated. A.

Fitting of a firing efficiency curve to a sigmoid function (see Methods) that is characterized by a threshold (the stimulus amplitude that produces a firing efficiency of 0.5) and σ (the standard deviation of the threshold fluctuations). B–C. Dependence of the threshold (B) and slope (C) values on the number of channels simulated, for each of the simulation methods. dt = 1 µs.