Longtin A, Derome J R
Biol Cybern. 1986;53(5):323-42. doi: 10.1007/BF00336564.
A system-type model of the acoustic reflex in man is proposed with the intention of sheding light on certain of its nonlinear behaviors. This model is the first to incorporate into the multipath structure of the reflex arc the adaptation and recovery processes. Parameter distribution in the parallel pathways is based on the current knowledge on the stapedius muscle and on motoneuron pool organization. A piecewise linear system is used in modeling adaptation at onset and recovery at offset. The model is calibrated at 2000 Hz, a frequency for which all the important parameters are available. Two nonlinear behaviors of the adaptation rate are explained: the frequency and intensity dependence, related respectively to the frequency dependence of the feedback gain and to the sigmoidal shape of the closed-loop stimulus-response curve. Underlying physiological mechanisms are discussed, along with other plausible nonlinear models, and extensions of the model to other stimuli are suggested.
提出了一种人类听觉反射的系统类型模型，旨在阐明其某些非线性行为。该模型首次将适应和恢复过程纳入反射弧的多径结构中。并行通路中的参数分布基于当前关于镫骨肌和运动神经元池组织的知识。在对起始适应和结束恢复进行建模时使用了分段线性系统。该模型在2000Hz频率下进行校准，这是一个所有重要参数都可用的频率。解释了适应率的两种非线性行为：频率和强度依赖性，分别与反馈增益的频率依赖性和闭环刺激-反应曲线的S形有关。讨论了潜在的生理机制以及其他合理的非线性模型，并提出了将该模型扩展到其他刺激的建议。
