Action potential propagates to long distances by the movement of the ions through voltage-gated ionic channels embedded in the plasma membrane of the neurons (Fig. ... As the cytoplasm becomes more positive, voltage-gated K⁺ channels open and K⁺ ions diffuse out of the neuron toward the extracellular space.

How action potentials are initiated and propagated?

In neurons, voltage-gated sodium conductances play an essential role in action potential initiation and propagation (Hodgkin and Huxley, 1952). ... As the cell membrane is depolarized, sodium channels activate, resulting in the influx of sodium ions to further depolarize the membrane.

What are propagated potentials?

The propagation potential is a sustained voltage that lasts as long as an action potential propagates between two widely spaced electrodes. The sign of the potential depends on the direction of action potential propagation.