Figure 10

Representative traces of first spike latency and rebound action potentials after injection of negative currents (− 0.5 to − 0.1 nA with 0.1 nA increment, holding voltage =  −  60 mV) plotted as a function of K channels following a hyperpolarizing conditioning pulse (− 100 to – 500 pA). Treatment with the small peptides (kunitz4-a, kunitz4-b, and kunitz4-c) is associated with a significant reduction in the rate of rebound action potentials after the application of hyperpolarizing current pulses.