Modeling and dynamics of double Hindmarsh–Rose neuron with memristor-based magnetic coupling and time delay*
Guoyuan Qi, Zimou Wang
Abstract
The firing of a neuron model is mainly affected by the following factors: the magnetic field, external forcing current, time delay, etc . In this paper, a new time-delayed electromagnetic field coupled dual Hindmarsh – Rose neuron network model is constructed. A magnetically controlled threshold memristor is improved to represent the self-connected and the coupled magnetic fields triggered by the dynamic change of neuronal membrane potential for the adjacent neurons. Numerical simulation confirms that the coupled magnetic field can activate resting neurons to generate rich firing patterns, such as spiking firings, bursting firings, and chaotic firings, and enable neurons to generate larger firing amplitudes. The study also found that the strength of magnetic coupling in the neural network also affects the number of peaks in thedischarge of bursting firing. Based on the existing medical treatment background of mental illness, the effects of time lag in the coupling process against neuron firing are studied. The results confirm that the neurons can respond well to external stimuli and coupled magnetic field with appropriate time delay, and keep periodic firing under a wide range of external forcing current.