So remember, at this point, our sodium voltage gated ions begin to recover. They begin to go from the inactivated state to the closed state. So basically, between the initiation point when the stimulus is applied and before our inactivated sodium channels begins to recover, this is known as the absolute refractory period. And this is the period at which if we apply a stimulus, no matter how high the stimulus is, our action potential will not begin again. We will not begin to initiate an action potential in the absolute refractory period. Now, we also have the relative refractory period, and this is this region here.