谢勇

Date:

2025-04-30

Title of Paper:

Critical amplitude curves for different periodic stimuli and different dynamical mechanisms of excitability

Journal:

Communications in Nonlinear Science and Numerical Simulation

Summary:

Critical amplitude curves for different periodic stimuli and different dynamical mechanisms of excitability are investigated numerically in the Morris–Lecar model neuron. It has been considered as a universal
phenomenon that critical amplitude curves exhibit U-shaped structures in the previous investigations. Nevertheless, we find that the critical amplitude relies on not only the type of a periodic stimulus but also
the dynamical mechanism of excitability of a neuron. The dynamical mechanism of excitability determines
whether a neuron is a resonator or integrator. There is a U-shaped structure in the critical amplitude curve
for a resonator subjected to a sinusoidal stimulus or a periodic pulse stimulus. However, in high frequency
range the critical amplitude increases monotonically with the stimulus frequency for a sinusoidal stimulus
and decreases monotonically for a periodic pulse stimulus. In contrast, for an integrator, the critical amplitude versus the stimulus frequency is always a monotonic curve. The change in the critical amplitude curve is shown through the Morris–Lecar model.

Co-author:

Yong Xie , Jian-Xue Xu , Yan-Mei Kang

Volume:

10(7)

Page Number:

823-832

Translation or Not:

No

Date of Publication:

2004-06-24