Fig 9. Assessing the dependence of f_res and Q_Z on the linear ${\overline{g}}_{Ca}-V_{1/2}^{C{a}_h^{\infty }}$ correlation.

a. Parameter values for each model were changed along a line parallel (‖, blue) to the correlation line (black) or along a perpendicular line (┴, grey). This was done for models with high (cyan; a1), low (red; a2) and intermediate (grey; a3) ${\overline{g}}_{Ca}$ models. For each model and each line, ‖ or ┴, we fit a line to the relative change in either f_res or Q_Z as a function of the relative change in ${\overline{g}}_{Ca}$. b. The sensitivity values of f_res or Q_Z to ‖ or ┴ are shown for the three groups.