Nano-scale solution of the Poisson-Nernst-Planck (PNP) equations in a fraction of two neighboring cells reveals the magnitude of intercellular electrochemical waves
Fig 5
Illustration of the definition of the transmembrane potential, v, and the Na+ current, INa, used in our computations.
The illustrations show a small part of the mesh in the (x, y)- or (x, z)-planes close to the Na+ channel (as illustrated on the right side of Fig 4).