Paulin M G, Montgomery J C
Biol Cybern. 1986;55(1):1-4. doi: 10.1007/BF00363972.
Eye movements were produced in an elasmobranch preparation by electrical stimulation of the horizontal canal ampullary nerves. A pseudorandom binary sequence of stimulus pulse trains was delivered bilaterally. Eye position during this stimulus was cross-correlated with the stimulus pattern to obtain a linear model of the response. Sums of exponential functions were fitted to the crosscorrelogram data to estimate time-constants and transfer functions. The data was examined in the frequency domain by using Fourier transformation. The response is accurately described by a second order linear filter, which is essentially a low pass filter with a cutoff at 0.22 Hz. This nearly two octaves below the cutoff frequency of the eye motor plant, which has been estimated by the same method. Our data shows that there is no central phase compensation or prediction which might offset the substantial delay in eye motor plant response. We hypothesise that the necessary phase compensation may be achieved by driving the vestibulo-ocular reflex with sensory neurons having a phase advance at high frequency.
通过电刺激水平半规管壶腹神经，在一种软骨鱼类标本中产生眼动。双侧施加刺激脉冲串的伪随机二进制序列。在此刺激期间的眼位与刺激模式进行互相关，以获得响应的线性模型。将指数函数的和拟合到互相关图数据，以估计时间常数和传递函数。通过使用傅里叶变换在频域中检查数据。该响应由二阶线性滤波器精确描述，该滤波器本质上是一个截止频率为0.22Hz的低通滤波器。这比通过相同方法估计的眼动装置的截止频率低近两个八度。我们的数据表明，不存在可能抵消眼动装置响应中实质性延迟的中枢相位补偿或预测。我们假设，必要的相位补偿可能通过驱动具有高频相位超前的感觉神经元的前庭眼反射来实现。
