Paulin M G, Montgomery J C
J Comp Physiol A. 1986 May;158(5):723-8. doi: 10.1007/BF00603830.
A pseudorandom binary sequence electrical pulse rate stimulus was delivered to the abducens nerve of an elasmobranch preparation. Ipsilateral eye movements were recorded using a position-sensitive photodiode to measure the position of a reflective patch attached to the fish's eye. Eye position data was cross-correlated with the stimulus pattern, and exponential decay curves were fitted to the cross-correlograms to estimate the time constant of a linear first order low-pass filter model. The cross-correlograms were transformed into the frequency domain using a Digital Fourier Transform, and Bode plots of eye dynamics were plotted. Eye motor plant dynamics in the elasmobranch Cephaloscyllium isabella can be accurately characterised by a linear first order low-pass filter model with a corner frequency of 0.73 +/- 0.10 Hz. Non-minimum phase lag reaches 90 degrees at about 4 Hz, indicating a time delay of some 50-60 ms. Integration of the canal signal is not required for producing compensatory eye movements above the characteristic frequency of the eye motor plant. However, the canal signal may be integrated to ensure that the vestibulo-ocular reflex is compensatory at lower frequencies. Substantial phase compensation or prediction is required for effective control of the vestibulo-ocular reflex.
将伪随机二进制序列电脉冲速率刺激施加到一种板鳃类动物标本的外展神经上。使用位置敏感光电二极管记录同侧眼球运动，以测量附着在鱼眼上的反光贴片的位置。将眼位数据与刺激模式进行互相关分析，并将指数衰减曲线拟合到互相关图，以估计线性一阶低通滤波器模型的时间常数。使用数字傅里叶变换将互相关图转换到频域，并绘制眼动动力学的波特图。板鳃类动物伊氏霞鲨的眼动装置动力学可以通过一个转折频率为0.73±0.10 Hz的线性一阶低通滤波器模型准确表征。非最小相位滞后在约4 Hz时达到90度，表明存在约50 - 60毫秒的时间延迟。在高于眼动装置特征频率时，产生补偿性眼球运动不需要整合半规管信号。然而，可能会整合半规管信号以确保前庭眼反射在较低频率下具有补偿性。有效控制前庭眼反射需要大量的相位补偿或预测。
