Department of Automation, Zhengzhou University School of Electrical Engineering, Zhengzhou, 450001, Henan, China.
Department of Automation, Tsinghua University, Beijing, 100084, China.
J Comp Physiol A Neuroethol Sens Neural Behav Physiol. 2020 Nov;206(6):845-855. doi: 10.1007/s00359-020-01442-6. Epub 2020 Aug 18.
The cathode ray tube (CRT) is a common and important tool that has been in use for decades, with which behavioral and visual neuroscientists deliver specific visual images generated by computers. Considering the operating principle of the CRT, the image it presents can flick at a constant rate, which will introduce distractions to the visual experiments on subjects with higher temporal resolutions. While this entrainment has been proved common in recordings of the primary visual cortex of mammals, it is uncertain whether it also exists in the intermediate to deep layers of pigeon's optic tectum, which is relevant to the spatial attention. Here, we present continuous visual stimuli with different refresh rates and luminances couples shown on a CRT to pigeons. The recordings in the intermediate to deep layers of optic tectum were significantly phase locking to the refresh of the CRT, and lower refresh rates of the CRT with higher brightness more likely introduced artifacts in electrophysiological recordings of pigeons, which may seriously damage their visual information perception.
阴极射线管（CRT）是一种常见且重要的工具，已经使用了几十年，行为和视觉神经科学家用它来提供计算机生成的特定视觉图像。考虑到 CRT 的工作原理，它呈现的图像可以以恒定的速率闪烁，这会给时间分辨率更高的受试者的视觉实验带来干扰。虽然这种调制已经在哺乳动物初级视觉皮层的记录中被证明很常见，但它是否也存在于与空间注意力相关的鸽子的视顶盖中间到深层，目前尚不确定。在这里，我们使用 CRT 向鸽子展示不同刷新频率和亮度组合的连续视觉刺激。视顶盖中间到深层的记录与 CRT 的刷新明显同步，而 CRT 的刷新频率较低且亮度较高，更有可能在鸽子的电生理记录中引入伪影，这可能严重损害它们对视觉信息的感知。
