Interactions among neuron kinetics and signal statistics. a) Firing rate vs signal STD for white noise, filtered white noise and 1/f noise. b) Half-height duration of action potentials vs signal STD for white noise, filtered white noise and 1/f noise. c) For a fixed input 1/f signal (STD = 1), firing rate change as a function of sodium activation time constant (τm), inactivation time constant (τh) and potassium activation time constant (τn). d) firing rate vs signal STD for , In the situation with both τh and τn being increased to 15 times larger.