Action potential propagation and synchronisation in myelinated axons
Fig 5
Propagation velocity as function of fibre diameter and axon diameter.
A: In myelinated axons, the relationship between velocity and fibre diameter is nearly linear, with a slightly supralinear relationship at small diameters. Here we compare the different scenarios with experimental results (grey-shaded area). B: In unmyelinated axons, the propagation speed increases approximately with the square root of the axon diameter. Here, ρ indicates the relative ion channel density compared with a node of Ranvier. Decreasing the ion channel density results in slower action potential propagation.