Intracellular membrane potential of cell and axon

[ayong1970]

In looking at simulations of resting membrane changes to a neuron in low Na+ ECF solution, I see that the membrane potential in the intracellular cell body and intracellular axon is the same voltage/value. Even in other simulations like where the ECF is high in K+, the voltage reading is the same between the intracellular cell body and intracellular axon.

But isn't this always the case? The cell body and axon are part of the same neuron and share the same plasma membrane ... and therefore, the intracellular readings should always be the same whether you measure intracellular cell body or intracellular axon. Is my understanding correct?

[david23]

you are talking about resting potential right, I think you are right. They are same.