QUANTITATIVE STUDIES OF VISUAL PATHWAYS IN PRIMATE

总体目标是了解中央视觉通路 分析有关色彩和空间属性的信息， 对象 提出了五个项目，所有这些项目都旨在 解释颜色视觉和其潜在的 physiology. 这项工作既涉及生理实验， 猕猴外侧膝状体记录 (LGN)纹状皮质皮质区V2和V4），以及 心理物理学对人类的实验，在所有这些，我将 测量对彩色电视机上显示图案的灵敏度 监视器. 第一个项目将调查的多路复用的彩色 在LGN的小细胞层的神经元中观察到的信号。 才能 看到神经元完成这种双重任务的感知信号， 彩色信号和消色差信号在 细胞的放电模式 第二个项目将审查 色适应的后感受器机制的作用。 他们中有几个人，他们是以他们的身份来区分的吗？ 色彩或时间特性，以及在视觉上 他们说谎的路吗？ 第三个项目将审查 纹状和纹外皮层神经元的可靠性 可以区分颜色，并将研究机制， 在某些神经元中产生对色调的急剧调整。 的 第四个项目将研究同步对比的作用 （色感应），并将研究其可能的 生理底物 最后的项目将检查是否 纹外皮层神经元可能在颜色中起作用 恒常性 他们是如何衡量来自不同的 感受野的一部分，以及它们的敏感性是如何调节的 积累的信号？

The overall aim is to understand how central visual pathways analyze information about the chromatic and spatial properties of objects. Five projects are proposed, all of which are intended to explicate the links between color vision and its underlying physiology. The work involves both physiological experiments and on macaque monkey (recording from Lateral Geniculate Nucleus (LGN), striate cortex an cortical areas V2 and V4) and psychophysical experiments on human, in all of which I shall measure sensitivity to patterns displayed on a color television monitor. The first project will investigate the multiplexing of chromatic signals seen in neurons in parvocellular layers of LGN. Can one see perceptual signs of this double-duty done by neurons, and can the chromatic and achromatic signals be distinguished in the discharge patterns of cells? The second project will examine the action of post-receptoral mechanisms of chromatic adaptation. Are there several of them, are they distinguished by their chromatic or temporal properties, and where in the visual pathway do they lie? The third project will examine the reliability with which neurons in striate and extrastriate cortex can distinguish hues, and will examine mechanism that could produce the sharp tuning for hue seen in some neurons. The fourth project will examine the role of simultaneous contrast (chromatic induction) and will investigate its possible physiological substrates. The final project will examine whether neurons in extrastriate cortex could play a role in color constancy. How do they weigh chromatic signals from different parts of the receptive field, and how is their sensitivity regulated by the accumulated signal?