Internal stochastic resonance in a model system for intracellular calcium oscillations

A model system for intracellular calcium oscillations was investigated when the control parameter was perturbed by noise near a Hopf bifurcation point. Noise-induced oscillations were observed. Furthermore, the output signal-to-noise ratio (SNR) of the system went through a maximum with the increment of noise intensity indicating the occurrence of internal stochastic resonance (SR), which showed the constructive role of noise at the cellular level.