So hyperpolarization basically means it drops the value below that resting memory potential to a value of about negative 80 millivolts. So the inactivation of the sodium channels and at the same time, the opening of those potassium voltage gated on channels causes the outflux of positive charge out of that cell. And so this rapid drop causes hyperpolarization such that the membrane potential drops below the resting potential of negative 70 millivolts. Now, after about two milliseconds from where everything essentially begun, what begins to happen is as a result of this drop in voltage, these voltage gated potassium ions will begin to close and some of them will also become inactivated in the same method that we discussed here. So the ball will basically enter that port section that will close that channel and will prevent the movement of these potassium potassium ions. And so what happens is, as both of these are closed and inactivated, we'll see that eventually that voltage difference will approach that resting membrane potential.