FIG. 9.

Geometric model used in the large deformation, three-dimensional finite element model of a myelinated axon. This repeating unit cell configuration contained a central axon with an unmyelinated node of Ranvier. Away from the node, the axon was surrounded by myelin. The bare axon diameter was 3 μm, and the length of the transverse square of the model was 4.93 μm. The node of Ranvier was 2.1 μm long, and the simulation depth of the model was 25 μm. (Color image is available online at www.liebertonline.com/neu.)