Difference and dispersive fits to bin counts of fibres diameters in rat subcortical white matter.

Myelinated (M) and unmyelinated (U) diameter data from the histograms in Figs. 4, 5 and 6 of Partadiredja et al. [36] were fit with difference Eq. (57), and its dispersive counterpart Eq. (58). Dispersive fits are indicated by a missing value, and , , , for tabulation. was used for all fits, but dependence on this was mild. For myelinated fibres the difference fit had no optimal , hence several orders were tried as indicated by in square brackets. However, was optimal for any chosen . The same holds true for the dispersive fit, and matching were tried. The entries marked with a show fits made to diameters only, i.e., without the first four (myelinated) data bins. Then optimal fit orders exist as shown. Here two sets of and confidence level are given: in brackets for the large diameters, without brackets compared to the full data. Unmyelinated data directly leads to the shown fits with optimal fit orders. and are compatible with the corresponding mean over values in Tabs. 4 and 5 of [36]: for myelinated and for unmyelinated fibres. Velocities are calculated here with .