Properties of the fiber models used in this study.

a-d: Blue dots indicate data points extracted from electrophysiological simulations; orange lines indicate fits to theoretical relationships. First row: Fiber velocity depends linearly on diameter for myelinated fibers (panel a) and is proportional to the square root of velocity for unmyelinated fibers (panel b). Second row: Stimulus threshold is inversely proportional to fiber diameter for myelinated (panel c) and unmyelinated (panel d) fibers. Third row: The temporal shape of the AP does not vary significantly with diameter for myelinated fibers (panel e; light blue: m, dark blue: m) and for unmyelinated fibers (panel f; light blue: m, dark blue: m).