FIRING PATTERNS AND BIFURCATION ANALYSIS OF NEURONS UNDER ELECTROMAGNETIC INDUCTION

Based on the three-dimensional endocrine neuron model, a fourdimensional endocrine neuron model was constructed by introducing the magnetic flux variable and induced current according to the law of electromagnetic induction. Firstly, the co dimension-one bifurcation and Interspike Intervals (ISIs) analysis were applied to study the bifurcation structure with respect to external stimuli and parameter k0, and two dynamical behaviors were found: period-adding and period-doubling bifurcation leading to chaos. Besides, Hopf bifurcation was specially discussed corresponding to the transformation of the state. Secondly, the different firing patterns such as regular bursting, subthreshold oscillations, fast spiking, mixed-mode oscillations (MMOs) etc. can be observed by changing the external stimuli and the induced current. The neuron model presented more firing activities under strong coupling strength. Finally, the codimension-two bifurcation analysis shown more details of bifurcation. At the same time, the Bogdanov-Takens bifurcation point was also analyzed and three bifurcation curves were derived.

Automated summary

The study explored the mathematical properties of a four-dimensional endocrine neuron model and discovered various dynamic behaviors, including period-adding, period-doubling, and mixed-mode oscillations. The model exhibited more firing activities under strong coupling strength, indicating that endocrine neurons are highly sensitive to changes in external stimuli and current.