Model parameter sensitivity analysis. (Left) Fractional change in features (peak, plateau, and tail current amplitudes) for a fivefold increase in the indicated patch model parameters in simulated patch model I_PB's triggered by 500 μM PB. (Right) Family of selected I_PB responses in control (thick solid lines) from the left panel with the indicated parameters. Open bar indicates PB application. (Insets) Responses replotted on an expanded timescale to illustrate the effects on the time course of tail currents (see Results).