Dynamics of Hodgkin-Huxley systems revisited

We consider the singularly perturbed Hodgkin-Huxley system subject to Neumann boundary conditions. We construct a family of exponential attractors {M_ε} which is continuous at ε = 0, ε being the parameter of perturbation. Moreover, this continuity result is obtained with respect to a metric independent of ε, compared with all previous results where the metric always depends on ε. In the latter case, one needs to consider more regular function spaces and more smoother absorbing sets. Our results show that we can construct and analyse the stability of exponential attractors in a natural phase-space as it is known for the global attractor. Also, a new proof of the upper semicontinuity of the global attractor A_ε at ε = 0 is given.