Fig 5. Model likelihood is shown for each genotype and age as a function of model complexity.

All models normalized to 8 week WT mouse. Models are shade-coded by RAC model, and color coded by inclusion of fiber thickness (blue), stochastic derecruitment (red) or both (purple). Models are separated into groups by the number of perturbations used in that simulation using empty space, so that model complexity can be appreciated. Models increased in complexity from left to right. For most simulations, fiber thickness is the single perturbation that provides the greatest increase in model likelihood. Derecruitment provides only modest improvement, except in 27 week WT and 80 week KO. In the 80 week WT, substantial improvement in model fit is observed with addition of all factors into the model.