Figure 3.

Unchanging distributions of Ca_res against fluctuation of the PF input gives robustness in the spine volume. The Amp_PF-dependency of p_c (Ca_res|Amp_PF) and the distributions of Ca_res in the spine volume (A) and in the cell volume (B) are shown. (C–H) The distributions of Ca_res against the PF input fluctuation with the indicated CV_a with μ_a = 180 in the spine volume (C–E) and in the cell volume (F–H), respectively, are shown. θ indicates the threshold dividing the distribution into the ranges with large Ca_res and with small Ca_res (see Fig. S1). (I) The CV_a-dependency of χ² distance of distributions between p_ac (Ca_res | μ_a, μ_a × CV_a) and p_ac (Ca_res | μ_a, 0) with μ_a = 180. (J) The input distribution of Amp_PF is given by the Gaussian distribution $\mathcal{N}$ (μ_a, σ_a²). The distribution of Ca_res with Amp_PF = μ_a (black), Amp_PF = μ_a + x (blue), and Amp_PF = μ_a − x (red) in the spine volume (left) and in the cell volume (right). The averaged distribution with Amp_PF = μ_a + x and with Amp_PF = μ_a − x (green). To see this figure in color, go online.