In neuroscience, repolarization is a critical process that occurs after the depolarization phase of an action potential. During an action potential, the cell's membrane potential becomes more positive as sodium ions rush into the cell. Repolarization is the subsequent phase where the membrane potential returns to its resting state, which is more negative inside than outside. This is primarily achieved by the opening of potassium channels, which allows potassium ions to flow out of the cell. The return to the resting membrane potential is essential for the cell to be ready for the next action potential. Without repolarization, the neuron would not be able to reset and fire again. read more >>

In neuroscience, repolarization refers to the change in membrane potential that returns it to a negative value just after the depolarization phase of an action potential has changed the membrane potential to a positive value. ... Repolarization usually takes several milliseconds.read more >>