Figure 5.

Ion channel currents during an action potential. The figures to the left correspond to the simulation with the pin electrode (Aδ model), and the figures to the right correspond to the simulation with the patch electrode (Aβ model). After a single rectangular-pulse-shaped stimulation current (0.4 mA) with a duration of 2 ms, an action potential was generated. (A) Membrane potential and ionic currents recorded at the tip of the axon for both the Aδ and Aβ models are shown. (B) The large ion channel currents are shown. (C) The small ion channel currents are shown. In the Aβ model, the current density for the potassium current is low for both the K_A current and K_Dr current because the combined area of the juxtaparanode is five times larger than the node of Ranvier. To see this figure in color, go online.