Physiology and Psychophysics of Spatial Vision

该研究项目包括一系列空间视觉某些方面的电生理和心理物理研究。在对纹状皮层（皮层区V1）的研究中，研究者建议检查与标记皮层模块的细胞色素氧化酶斑点相关的细胞调整到不同方向和空间频率的排列。研究人员还计划研究纹状细胞的空间频率调谐和相位特异性如何随偏心度而变化。在对第二皮层视觉区（V2）细胞的研究中，我们将确定这些细胞如何对V1单元的简单模式和更复杂的模式做出反应。探索在这一层次的信息处理中可能发生的转换。在心理物理实验中，研究者将研究人类独立于模式特征之外的模式定位能力的某些方面，并研究依赖于比例判断的模式识别问题。选择这两个问题区域是为了在感知实验中探索在考虑皮层区域V1和V2中细胞可能的作用时出现的某些问题。本研究项目的结果将为我们了解大脑对视觉信息的处理提供重要的信息。

This research project consists of a series of electrophysiological and psychophysical studies of certain aspects of spatial vision. In studies of the striate cortex (cortical area V1), the investigators propose to examine the arrangement of cells tuned to various orientations and spatial frequencies in relation to the cytochrome oxidase blobs marking the cortical modules. The investigators also plan to examine how the spatial frequency tuning and phase-specificity of striate cells vary with eccentricity. In studies of cells in the second cortical visual area (V2), it will be determined how these cells respond to simple patterns which well characterize V1 units, and to somewhat more complex patterns, to explore possible transformations occurring in information processing at this level. In the psychophysical experiments, the investigators will examine certain aspects of human ability to localize patterns independent of the characteristics of the patterns, and to study some problems of pattern discrimination which depend on ratio judgments. Both of these problem areas were chosen to explore in perceptual experiments certain issues which have arisen in considering the possible roles of cells in cortical areas V1 and V2. The results of this research project will contribute important information to our knowledge of visual information processing by the brain.