Noise and Periodic Modulations in Neural Excitable Media
  We have analyzed the interplay between noise and periodic modulations in a mean field model of a neural excitable medium. To this purpose, we have considered two types of modulations; namely, variations of the resistance and oscillations of the threshold. In both cases, stochastic resonance is present, irrespective of if the system is monostable or bistable. 
J. M. G. Vilar, R. V. Sol\'e, and J. M. Rub\'i