Figure 8

The largest Lyapunov exponent (LE) and bifurcations of the noisy hair cell. (a) The LE is shown as a function of the BK and K1 conductances b and g_K1. White lines indicate the AH bifurcations of the deterministic system. The blue line demarcates the period doubling bifurcation of a large-amplitude limit-cycle (cf. Figure 2H,G). White dots indicate positive values of the LE for the deterministic system. Other parameters are the same as in Figure 7. (b) Interspike intervals vs the control parameter g_K1 for b = 0.1. Black dots indicate instantaneous periods of the stochastic dynamics, i.e., taking into account a fluctuating MET current (ε = 1). (c) Interspike intervals versus g _{K 1} for b = 0.01. Other parameters: g_MET = 0.65 nS, g_L = 0.1 nS, g_Ca = 1.2 nS, g_h = 2.2 nS.