Figure 5. Restoration from inactivation.

A, inactivation was produced by depolarizing pulses to +20 mV of 15 s duration. The degree of recovery was determined by applying 500 ms test pulses to +20 mV at variable distance from the end of the prepulse. The time between the end of the test pulse and the beginning of the next prepulse was 90 s. The example shows an experiment at a restoration potential of -90 mV. B, superimposed and scaled test pulse responses of the restoration experiment shown in A.