4.7 Article

Biological experimental demonstration of bifurcations from bursting to spiking predicted by theoretical models

期刊

NONLINEAR DYNAMICS
卷 78, 期 1, 页码 391-407

出版社

SPRINGER
DOI: 10.1007/s11071-014-1447-5

关键词

Bifurcation; Neural firing; Chaos; Bursting; Spiking; Period-adding bifurcation

资金

  1. National Natural Science Foundation of China [11372224, 11072135]
  2. Fundamental Research Funds for Central Universities [1330219127]
  3. Hong Kong Research Grants Council under the GRF [CityU1109/12E]

向作者/读者索取更多资源

A series of bifurcations from period-1 bursting to period-1 spiking in a complex (or simple) process were observed with increasing extra-cellular potassium concentration during biological experiments on different neural pacemakers. This complex process is composed of three parts: period-adding sequences of burstings, chaotic bursting to chaotic spiking, and an inverse period-doubling bifurcation of spiking patterns. Six cases of bifurcations with complex processes distinguished by period-adding sequences with stochastic or chaotic burstings that can reach different bursting patterns, and three cases of bifurcations with simple processes, without the transition from chaotic bursting to chaotic spiking, were identified. It reveals the structures closely matching those simulated in a two-dimensional parameter space of the Hindmarsh-Rose model, by increasing one parameter and fixing another parameter at different values. The experimental bifurcations also resembled those simulated in a physiologically based model, the Chay model. The experimental observations not only reveal the nonlinear dynamics of the firing patterns of neural pacemakers but also provide experimental evidence of the existence of bifurcations from bursting to spiking simulated in the theoretical models.

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