Delay-induced synchronization transition in small-world hodgkin-huxley neuronal networks with channel blocking

We study the evolution of spatiotemporal dynamics and synchro- nization transition on small-world Hodgkin-Huxley (HH) neuronal networks that are characterized with channel noises, ion channel blocking and infor- mation transmission delays. In particular, we examine the effects of delay on spatiotemporal dynamics over neuronal networks when channel blocking of potassium or sodium is involved. We show that small delays can detriment synchronization in the network due to a dynamic clustering anti-phase synchro- nization transition. We also show that regions of irregular and regular wave propagations related to synchronization transitions appear intermittently as the delay increases, and the delay-induced synchronization transitions mani- fest as well-expressed minima in the measure for spatial synchrony. In addition, we show that the fraction of sodium or potassium channels can play a key role in dynamics of neuronal networks. Furthermore, We found that the fraction of sodium and potassium channels has different impacts on spatiotemporal dy- namics of neuronal networks, respectively. Our results thus provide insights that could facilitate the understanding of the joint impact of ion channel block- ing and information transmission delays on the dynamical behaviors of realistic neuronal networks.