Recruitment and overlap data, and goodness-of-fit of mathematical models. (a) Recruitment data for a single contact, fit with a Gompertz model. (b) Average R2 and AICc ranking of eight models fit to recruitment data. A higher AICc rank score denotes a better fit. (c) Overlap data for two contacts within a nerve-cuff, fit with a third-order polynomial model. (d) Average R2 and AICc ranking of five models fit to overlap data.