Figure 6.

The mechanism of efficiency. (A) The volume-dependency of the mutual information between Amp_PF and Ca_res is provided. (B) The volume-dependency of the mutual information per PF input, i.e., the efficiency is shown. The total mutual information is shown in black; the fitted curve of the total mutual information with the a log₂ (b + c×V) with a = 0.3924651, b = 1.049141, and c = 1.330285, is shown in red; the channel capacity of the Gaussian channel, 1/2 log₂ (1 + cV) with c = 0.5128671, is shown in blue (see Materials and Methods). We assume the input distribution of Amp_PF as the Gaussian distribution with μ_s = 150, the average of the amplitude of the distribution of the PF input, and STD = 40 as the SD of the distribution of the PF input. To see this figure in color, go online.