论文标题
预期和视网膜的负面延迟
Anticipation and Negative Group Delay in a Retina
论文作者
论文摘要
负组延迟（NGD）的机制用于了解视网膜的预期能力。进行了来自牛蛙的视网膜的实验，以与NGD模型的预测进行比较。从细节上讲，使用各种时间相关性的整个田间随机刺激用于探测视网膜的预期反应。我们发现，NGD模型可以重现以刺激和视网膜反应之间的跨相关性为特征的实验观察的基本特征。发现视网膜的预测范围取决于NGD模型预测的刺激时间的相关时间。深色和明亮的高斯光脉冲的实验进一步支持NGD机制。但是，仅对于黑暗脉冲表明，视网膜的NGD效应可能起源于其关闭反应。我们的发现表明，能够使用负面反馈进行适应的感觉系统会由于系统延迟而引起预期。
The mechanism of negative group delay (NGD) is used to understand the anticipatory capability of a retina. Experiments with retinas from bull frogs are performed to compare with the predictions of the NGD model. In particulars, whole field stochastic stimulation with various time correlations are used to probe anticipatory responses from the retina. We find that the NGD model can reproduce essential features of experimental observations characterized by the cross correlations between the stimulation and the retinal responses. The prediction horizon of a retina is found to depend on the correlation time of the stimulation as predicted by the NGD model. Experiments with dark and bright Gaussian light pulses further support the NGD mechanism; but only for the dark pulses indicating that the NGD effect of a retina might originate from its OFF response. Our finding suggests that sensory systems capable of using negative feedback for adaptation can give rise to anticipation as a consequence of the delay in the system.
