Analysis and Control of the Hodgkin-Huxley Model
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Abstract
Objective: The Hodgkin-Huxley model is one of the most influential mathematical models in neuroscience, describing how electrical activity is generated and propagated in neurons. In this work, bifurcation analysis and Multiobjective Nonlinear Model Predictive Control are performed on the dynamic Hodgkin-Huxley model.
Methods: The MATLAB program MATCONT was used to perform the bifurcation analysis. The MNLMPC calculations were performed using the optimization language PYOMO in conjunction with the state-of-the-art global optimization solvers IPOPT and BARON.
Results: The bifurcation analysis revealed the existence of Hopf bifurcation points and limit points. The MNLMC converged on the Utopian solution. Hopf bifurcation points, which cause unwanted limit cycles, are eliminated using an activation function based on the tanh function.
Conclusion: The limit points (which cause multiple steady-state solutions from a singular point) are very beneficial because they enable the Multiobjective Nonlinear Model Predictive Control calculations to converge to the Utopia point (the best possible solution) in the model. The tanh activation function is highly effective at eliminating Hopf Bifurcations.
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1. Hodgkin AL, Huxley AF. A quantitative description of membrane current and its application to conduction and excitation in nerve. J Physiol. 1952;117(4):500–544. Available from: https://doi.org/10.1113/jphysiol.1952.sp004764
2. Fitzhugh R. Mathematical models of excitation and propagation in nerve. In: Schwan HP, editor. Biological Engineer. New York (NY): McGraw-Hill; 1969.
3. Chay TRL, Keizer J. Minimal model for membrane oscillations in the pancreatic β-cell. Biophys J. 1983;42(2):181–190. Available from: https://doi.org/10.1016/s0006-3495(83)84384-7
4. Bedrov YA, Akoev GN, Dick OE. Partition of the Hodgkin-Huxley type model parameter space into the regions of qualitatively different solutions. Biol Cybern. 1992;66(5):413–418. Available from: https://doi.org/10.1007/bf00197721
5. Guckenheimer J, Labouriau JS. Bifurcation of the Hodgkin and Huxley equations: a new twist. Bull Math Biol. 1993;55(5):937–952. Available from: https://doi.org/10.1016/S0092-8240(05)80197-1
6. Bedrov YA, Dick OE, Nozdrachev AD, Akoev GN. Method for constructing the boundary of the bursting oscillations region in the neuron model. Biol Cybern. 2000;82(6):493–497. Available from: https://doi.org/10.1007/s004220050602
7. Fukai H, Doi S, Nomura T, Sato S. Hopf bifurcations in multiple-parameter space of the Hodgkin-Huxley equations I. Global organization of bistable periodic solutions. Biol Cybern. 2000;82(3):215–222.
8. Fukai H, Nomura T, Doi S, Sato S. Hopf bifurcations in multiple-parameter space of the Hodgkin-Huxley equations II. Singularity theoretic approach and highly degenerate bifurcations. Biol Cybern. 2000;82(3):223–229.Available from: https://doi.org/10.1007/s004220050022
9. Zhu X, Wu Z. Equilibrium point bifurcation and singularity analysis of HH model with constraint. Abstr Appl Anal. 2014;2014:545236. Available from: https://doi.org/10.1155/2014/545236
10. Dhooge A, Govaerts W, Kuznetsov AY. MATCONT: A Matlab package for numerical bifurcation analysis of ODEs. ACM Trans Math Softw. 2003;29(2):141–164
11. Dhooge A, Govaerts W, Kuznetsov YA, Mestrom W, Riet AM. CL_MATCONT: A continuation toolbox in Matlab. 2004.
12. Kuznetsov YA. Elements of applied bifurcation theory. New York (NY): Springer; 1998.
13. Kuznetsov YA. Five lectures on numerical bifurcation analysis. Utrecht University; 2009.
14. Govaerts WJF. Numerical methods for bifurcations of dynamical equilibria. Philadelphia (PA): SIAM; 2000.
15. Dubey SR, Singh SK, Chaudhuri BB. Activation functions in deep learning: A comprehensive survey and benchmark. Neurocomputing. 2022;503:92–108. Available from: https://doi.org/10.1016/j.neucom.2022.06.111
16. Kamalov AF, Nazir M, Safaraliev AK, Cherukuri, Zgheib R. Comparative analysis of activation functions in neural networks. In: 2021 28th IEEE Int Conf Electron Circuits Syst (ICECS); Dubai, United Arab Emirates. IEEE; 2021. p. 1–6. Available from: https://doi.org/10.1109/ICECS53924.2021.9665646
17. Szandała T. Review and comparison of commonly used activation functions for deep neural networks. ArXiv. 2020. Available from: https://doi.org/10.1007/978-981-15-5495-7
18. Sridhar LN. Bifurcation analysis and optimal control of the tumor macrophage interactions. Biomed J Sci Tech Res. 2023;53(5):MS.ID.008470. Available from: https://doi.org/10.26717/BJSTR.2023.53.008470
19. Sridhar LN. Elimination of oscillation causing Hopf bifurcations in engineering problems. J Appl Math. 2024;2(4):1826. Available from: https://doi.org/10.59400/jam1826
20. Flores-Tlacuahuac A, Morales P, Riveral Toledo M. Multiobjective nonlinear model predictive control of a class of chemical reactors. Ind Eng Chem Res. 2012;51(16):5891–5899.
21. Hart WE, Laird CD, Watson JP, Woodruff DL, Hackebeil GA, Nicholson BL, et al. Pyomo – Optimization modeling in Python. 2nd ed. Vol. 67.
22. Wächter A, Biegler LT. On the implementation of an interior-point filter line-search algorithm for large-scale nonlinear programming. Math Program. 2006;106:25–57. Available from: https://doi.org/10.1007/s10107-004-0559-y
23. Tawarmalani M, Sahinidis NV. A polyhedral branch-and-cut approach to global optimization. Math Program. 2005;103(2):225–249.
24. Sridhar LN. Coupling bifurcation analysis and multiobjective nonlinear model predictive control. Austin Chem Eng. 2024;10(3):1107.
25. Upreti SR. Optimal control for chemical engineers. Boca Raton (FL): Taylor & Francis; 2013.
26. Sridhar LN. Analysis and control of the bacterial meningitis disease model. Glob J Med Clin Case Rep. 2025;12(10):206–213. Available from: https://doi.org/10.17352/gjmccr.000227