What we are doing is we're increasing the frequency, we're increasing the frequency of oscillation of the action potential. So instead of having one action potential in this time period, by increasing the stimulus, we're basically increasing the number of action potentials within this period. So instead of one, we might have two or three action potentials take place within the same exact time period. Now, the last thing that I want to mention is something called the refractory period. So we have an absolute refractory period and we have a relative refractory period. So the absolute refractory period is the period between this point and this point.