HIGHER ORDER MECHANISMS IN COLOR VISION

色觉中的高阶机制

• 批准号: 2160681
• 负责人: JOHN KRAUSKOPF
• 金额: $ 22.98万
• 依托单位: NEW YORK UNIVERSITY
• 依托单位国家: 美国
• 财政年份: 1986
• 资助国家: 美国
• 起止时间: 1986-09-01 至 1997-08-31
• 项目状态: 已结题
• 来源: https://reporter.nih.gov/project-details/2160681
• 关键词: Macaca; color blindness; color visions; cone cell; eye accommodation; human subject; lateral geniculate body; magnetic field; motion perception; neural information processing; psychometrics; psychophysics; single cell analysis; space perception; stimulus /response; vision tests; visual feedback; visual pathways; visual stimulus; visual threshold

The major goal of this proposal is the understanding of the nature of higher order color mechanisms. By higher order mechanisms are meant elements in the chain of visual lprocessing beyond the second stage mechanisms of most conventional models of vision. The existence of such mechanisms has been suggested by the detailed analysis of the selective desensitization resulting from the viewing of modulated fields, and by the relation between the discrimination and detection of pulse changes in color. Experiments on the variation in color discrimination over color space under condiitions of constant adaptation will be continued and extended. These experiments should lead to new standards with which to describe color discrimination in everyday life. Theoretical analysis of the factors that control the detectability and appearance of brief, small monochromatic lights is proposed. The results of this analysis should help in generating estimates of the distribution of the different classes of cone receptors. Experiments are proposed on the role of color in the detection of motion. These experiments should help in determining the stage at which signals from the separate ,second stage mechanisms interact. Experiments are planned on the influence of color on the ability to judge the crientation of lines. These experiments should provide information on the ability of chromatic mechanisms to process spatial information. Recording of the magnetic fields generated in response to chromatic and luminance Ipulses will be made. The goal of these experiments is to see whether this method will provide evidence to support the theory that information about the chromatic and achromatic aspects of stimuli are transmitted through separate neural systems. Continued collaboration in studies of the properties of single neurons in the monkey i,visual system is planned. Methods which have proved fruitful in the characterization of !units in the lateral geniculate will be applied to cortical systems in Vl, V2, and V4.

该提案的主要目标是理解 高阶颜色机制。高阶机制是指 第二阶段之外的视觉处理链中的元素 大多数传统视觉模型的机制。这样的存在 通过对选择性的详细分析，提出了机制 观察调制场导致的脱敏，以及 脉搏变化的辨别与检测之间的关系 颜色。 颜色空间下颜色辨别力变化的实验 持续适应的条件将继续并扩大。这些 实验应该会产生描述颜色的新标准 日常生活中的歧视。 控制可检测性因素的理论分析 提出了简短、小型单色灯的外观。结果 该分析应有助于生成分布的估计 不同类别的视锥受体。 提出了关于颜色在运动检测中的作用的实验。 这些实验应该有助于确定信号发生的阶段 从单独的角度来看，第二阶段机制相互作用。 计划进行实验研究颜色对判断能力的影响 线条的方向。这些实验应该提供以下信息： 色彩机制处理空间信息的能力。 记录响应色度和色度而产生的磁场 将产生亮度脉冲。这些实验的目的是看看 该方法是否可以提供证据来支持以下理论： 有关刺激的彩色和非彩色方面的信息是 通过单独的神经系统传输。 继续合作研究单个神经元的特性 猴子i视觉系统正在计划中。已被证明卓有成效的方法 将应用外侧膝状体 ! 单位的表征 至V1、V2和V4中的皮质系统。