Holden A V, Ramadan S M
Biol Cybern. 1981;42(2):79-85. doi: 10.1007/BF00336725.
The amplitude and rate of transient and maintained responses of an identified giant neurone of the pond-snail, Lymnaea stagnalis, to a maintained injected current were investigated. The responses of the isopotential soma to a maintained current density of less than 10 microamperemeter cm -2 includes repetitive discharges of action potentials, sawtooth oscillations and amplitude-modulated oscillations. The frequency of the maintained response increases as the injected current increases, while the amplitude decreases until the maintained response is a stable steady state at a membrane potential of about -20 mV. This bifurcation from small amplitude periodic solutions to a depolarized stable steady state has the characteristics of a supercritical Hopf bifurcation.
研究了池塘蜗牛椎实螺（Lymnaea stagnalis）中一个已识别的巨型神经元对持续注入电流的瞬态和持续反应的幅度和速率。等电位胞体对小于10微安/平方厘米的持续电流密度的反应包括动作电位的重复发放、锯齿状振荡和幅度调制振荡。随着注入电流增加，持续反应的频率增加，而幅度减小，直到在约-20 mV的膜电位下持续反应成为稳定的稳态。从小幅度周期解到去极化稳定稳态的这种分岔具有超临界霍普夫分岔的特征。
