Figure 6.

Values of ρ_{endo-bulk-transverse} obtained with the model and the analytical expression as a function of ρ_endo-micro (a), fascicle diameter (b), and AAF (c and d). In (a), we used the default parameters of 1 μm axons, AAF = 43.5%, and dist_min = 0.1 μm. In the AAF sweep with 1 μm axons (c), ρ_{endo-bulk-transverse} was evaluated for random axon placement, quasi-structured axon placement, and the analytical expression. In the AAF sweep with 2 μm axons (d), we evaluated ρ_{endo-bulk-transverse} for quasi-structured placement with four different minimum inter-axonal distances (dist_min), as well as the analytical expression.