Also known as repolarisation
thumb|A labeled diagram of an action potential. As seen above, repolarization takes place just after the peak of the action potential, when K+ ions rush out of the cell. 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 which has changed the membrane potential to a positive value. The repolarization phase usually returns the membrane potential back to the resting membrane potential. The efflux of potassium (K+) ions results in the falling phase of an action potential. The ion