Nernst & Goldman Membrane Potentials

Connect ionic gradients and temperature to equilibrium and resting potentials, then compare dipole and quadrupole far-field decay.

Chapter 7
Nernst
GHK
electrogenesis

GHK Vm

-75.35 mV

-95.02 mV

ENa

66.60 mV

ECl

-90.90 mV

Membrane potential vs extracellular potassium

GHKK equilibrium

Far-field potential decay

Dipole r⁻²Quadrupole r⁻³

Model scope

Nernst/GHK assumes constant field, fixed intracellular K/Na/Cl = 140/12/4 mM, monovalent ions, and relative K permeability 1. It is not an action-potential or clinical potassium model. Multipole curves compare equal voltage at a reference distance, not equal biological sources.

Preparing the simulation…

Conceptual bridges & related modules

Volume Conduction & Spherical Head Models
prerequisite · Chapter 7
Move from cellular electrogenesis to measurable extracellular fields.