# American Institute of Mathematical Sciences

September  2011, 16(2): 457-474. doi: 10.3934/dcdsb.2011.16.457

## Global Hopf bifurcation analysis of a six-dimensional FitzHugh-Nagumo neural network with delay by a synchronized scheme

 1 School of Information Science and Technology, Donghua University, Shanghai 201620, China 2 School of Civil and Architecture Engineering, Wuhan University of Technology, Wuhan 430070, China 3 Institute for Cognitive Neurodynamics,School of Science, East China University of Science and Technology, Shanghai, 200237, China 4 School of Mathematics and Computer Science, Fujian Normal University, Fuzhou 350007, China 5 Centre for Applied Dynamics Research, University of Aberdeen, Aberdeen AB24 3UE, United Kingdom

Received  March 2010 Revised  December 2010 Published  June 2011

Global Hopf bifurcation analysis is carried out on a six-dimensional FitzHugh-Nagumo (FHN) neural network with a time delay. First, the existence of local Hopf bifurcations of the system is investigated and the explicit formulae which can determine the direction of the bifurcations and the stability of the periodic solutions are derived using the normal form method and the center manifold theory. Then the sufficient conditions for the system to have multiple periodic solutions when the delay is far away from the critical values of Hopf bifurcations are obtained by using the Wu's global Hopf bifurcation theory and the Bendixson's criterion. Especially, a synchronized scheme is used during the analysis to reduce the dimension of the system. Finally, example numerical simulations are given to support the theoretical analysis.
Citation: Fang Han, Bin Zhen, Ying Du, Yanhong Zheng, Marian Wiercigroch. Global Hopf bifurcation analysis of a six-dimensional FitzHugh-Nagumo neural network with delay by a synchronized scheme. Discrete & Continuous Dynamical Systems - B, 2011, 16 (2) : 457-474. doi: 10.3934/dcdsb.2011.16.457
##### References:
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##### References:
 [1] J. J. Hopfield, Neurons with graded response have collective computational properties like those of two-state neurons,, Proc. Natl. Acad. Sci. USA, 81 (1984), 3088. doi: 10.1073/pnas.81.10.3088. [2] Q. S. Lu, Z. Q. Yang, L. X. Duan, H. G. Gu and W. Ren, Dynamics and transitions of firing patterns in deterministic and stochastic neuronal systems,, Chaos, 40 (2009), 377. doi: 10.1016/j.chaos.2007.08.040. [3] J. Xu, K. W. Chung and C. L. Chan, An efficient method for studying weak resonant double Hopf bifurcation in nonlinear systems with delayed feedbacks,, SIAM J. Applied Dynamical Systems, 6 (2007), 29. doi: 10.1137/040614207. [4] H. Kitajima and H. Kawakami, Bifurcations in synaptically coupled neurons with external impulsive forces,, IEIC Technical Report, 183 (2003), 33. [5] B. Nikola and T. Dragana, Dynamics of Fitzugh-Nagumo excitable systems with delayed coupling,, Phys. Rev. E, 67 (2003). doi: 10.1103/PhysRevE.67.066222. [6] B. Nikola, I. Grozdanovi and N. Vasovi, Type I vs. type II excitable systems with delayed coupling,, Chaos, 4 (2005), 1221. [7] Q. Y. Wang, Q. S. Lu and G. R. Chen, Bifurcation and synchronization of synaptically coupled FHN models with time delay,, Chaos, 39 (2009), 918. doi: 10.1016/j.chaos.2007.01.061. [8] J. J. Wei and M. Y. Li, Global existence of periodic solutions in a tri-neuron network model with delays,, Physica D, 198 (2004), 106. doi: 10.1016/j.physd.2004.08.023. [9] C. J. Sun, M. A. Han and X. M. Pang, Global Hopf bifurcation analysis on a BAM neural network with delays,, Physics Letters A, 360 (2007), 689. doi: 10.1016/j.physleta.2006.08.078. [10] X. P. Yan, Hopf bifurcation and stability for a delayed tri-neuron network model,, J. Comp. Appl. Math., 196 (2006), 579. doi: 10.1016/j.cam.2005.10.012. [11] B. D. Hassard, N. D. Kazarinoff and Y. H. Wan, "Theory and Application of Hopf Bifurcation,", Cambridge University Press, (1981). [12] J. Wu, Symmetric functional differential equations and neural networks with memory,, Trans. Amer. Math. Soc., 350 (1998), 4799. doi: 10.1090/S0002-9947-98-02083-2. [13] M. Y. Li and J. Muldowney, On Bendixson's criterion,, J. Differential Equations, 106 (1994), 27. doi: 10.1006/jdeq.1993.1097. [14] R. FitzHugh, Impulses and physiological states in theoretical models of nerve membrane,, Biophys. J., 1 (1961), 445. doi: 10.1016/S0006-3495(61)86902-6. [15] J. Nagumo, S. Arimoto and S. Yoshizawa, An active pulse transmission line simulating nerve axon,, Proc. IRE, 50 (1962), 2061. [16] Y. Kuang, "Delay Differential Equations with Applications in Population Dynamics,", Academic Press, (1993). [17] J. Hale, "Theory of Functional Differential Equations,", Springer, (1977).
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