Suppr超能文献

猕猴纹状皮层中的颜色视觉机制:具有同心感受野的双拮抗细胞。

Color vision mechanisms in monkey striate cortex: dual-opponent cells with concentric receptive fields.

作者信息

Michael C R

出版信息

J Neurophysiol. 1978 May;41(3):572-88. doi: 10.1152/jn.1978.41.3.572.

Abstract
  1. I have recorded with tungsten microelectrodes from single cells in the monkey's visual cortex and have specifically studied those neurons which were sensitive to the color of the stimulus. In the primate striate cortex there are four classes of color-coded cells. The cells described in this paper have concentric receptive fields with one red-green opponent-color system in the field center and the opposite organization in the surround. These dual-opponent cells were nost sensitive to the simultaneous presentation of two different colors, one covering the field center and the other illuminating the surround. They are probable involved in the perception of simultaneous color-contrast phenomena. 2. Spectral sensitivity curves revealed that both the field centers and the surrounds received opposite types of inputs from red-sensitive and green-sensitive cones. None of the cells tested had inputs from rods. 3. Area-sensitivity curves showed that peripheral suppression was present for both phases of the center opponent-color system. The boundary between the center and the surround was the same for both sets of opponent systems. Some cells had "silent" surrounds, which did not respond to annular stimuli. 4. Multiple-unit recordings from a concentric cell and one of its presumed afferents yielded information regarding its possible synaptic inputs. In some cases the cells appeared to receive contacts from red/green opponent-color geniculated fibers with circular receptive fields that lacked an antagonistic surround (similar to Wiesel and Hubel's (37) type II class). In other instances the afferents had on-center, off surround receptive fields or the reverse, but received inputs from only one cone type, either red or green (similar to Wiesel and Hubel's type III class). 5. Concentric cells were always driven by only one eye. 6. The laminar distribution of these cells was limited almost entirely to layer IV and its subdivisions. 7. The cumulative evidence presented in this paper indicates that the concentric cells probably received direct geniculate inputs and, therefore, they are the first cortical stage in the integration of color-contrast information.
摘要
  1. 我用钨微电极记录了猴子视觉皮层单个细胞的活动,并专门研究了那些对刺激颜色敏感的神经元。在灵长类动物的纹状皮层中有四类颜色编码细胞。本文所描述的细胞具有同心感受野,在视野中心有一个红-绿对立颜色系统,而在周围则是相反的组织形式。这些双对立细胞对同时呈现的两种不同颜色最为敏感,一种覆盖视野中心,另一种照亮周围区域。它们可能参与了同时颜色对比现象的感知。2. 光谱敏感性曲线表明,视野中心和周围区域从对红色敏感和对绿色敏感的视锥细胞接收相反类型的输入。所测试的细胞均没有来自视杆细胞的输入。3. 面积敏感性曲线表明,中心对立颜色系统的两个阶段都存在外周抑制。两组对立系统的中心和周围之间的边界是相同的。一些细胞有“沉默”的周围区域,对环形刺激没有反应。4. 对一个同心细胞及其推测的传入神经之一进行的多单位记录产生了关于其可能的突触输入的信息。在某些情况下,这些细胞似乎从具有圆形感受野且缺乏拮抗周围区域的红/绿对立颜色膝状体纤维接收联系(类似于维泽尔和休伯尔(37)的II型)。在其他情况下,传入神经具有中心开、周围关的感受野或相反情况,但仅从一种视锥细胞类型接收输入,要么是红色要么是绿色(类似于维泽尔和休伯尔的III型)。5. 同心细胞总是仅由一只眼睛驱动。6. 这些细胞的层状分布几乎完全局限于IV层及其亚层。7. 本文提出的累积证据表明,同心细胞可能接收直接的膝状体输入,因此,它们是颜色对比信息整合的第一个皮层阶段。

文献AI研究员

20分钟写一篇综述,助力文献阅读效率提升50倍。

立即体验

用中文搜PubMed

大模型驱动的PubMed中文搜索引擎

马上搜索

文档翻译

学术文献翻译模型,支持多种主流文档格式。

立即体验