Horizontal segregation of color information in the middle layers of foveal striate cortex.
Horizontal segregation of color information in the middle layers of foveal striate cortex.
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中央凹纹状皮层中间层颜色信息的水平分离。
DOI：
10.1152/jn.1987.57.3.712
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发表时间：
1987
影响因子：
2.5
通讯作者：
Vautin,RG
中科院分区：
文献类型：
--
作者：
Dow,BM;Vautin,RG
本研究通过一系列尽可能垂直于各层的微电极穿透来检查清醒猴中央凹纹状皮质的色彩组织。该研究包括79个渗透和261个细胞，其中218个细胞进行了系统的颜色选择性测试。对41个穿透的子集进行了详细分析，其中包括164个颜色测试的细胞，平均每个穿透4个细胞。根据定向选择性试验，将侵彻分为两大类。一组穿透在微电极轨迹的前600微米（上层）中包含至少一个非定向细胞，而另一组穿透在微电极轨迹的前600微米中仅包含定向细胞。这两个组分别称为N（非定向）和O（定向）。对N和O渗透中细胞的颜色特性的分析表明，N渗透中的中层细胞对白色光的反应较差，并且对末端光谱波长的颜色偏好，即，红色或蓝色。相比之下，在O穿透中层细胞，反应良好，白色光和中光谱波长。有两个亚组的N渗透，其特点是主要的红色（NR）或蓝色（NB）的中间层的敏感性。O穿透同样可分为三个亚组（OG、OY、OW），其特征分别为对绿色波长（490-540 nm）、黄色波长（550-600 nm）或白色（即，所有颜色）。尽管确定了五个亚组，NR和OY之间，NB和OG之间，OY和OW亚组之间的相似性可能是一致的连续。N穿透的中间层包含一类独特的细胞，其兴奋性反应仅限于两个光谱端，endspectral双峰细胞。提出了一个模型的颜色组织层4在中央凹纹状皮质，红色和蓝色区域与交替的细胞色素氧化酶“斑点”的层2和3，白色区域与interblob中心，黄色和绿色区域之间的注册。
The present study examines the chromatic organization of foveal striate cortex in the awake monkey by means of a series of microelectrode penetrations made as perpendicular as possible to the layers. The study includes 79 penetrations and 261 cells, of which 218 were tested systematically for color selectivity. Detailed analyses are conducted on a subset of 41 penetrations, which included 164 color-tested cells, an average of four cells per penetration. The penetrations were divided into two major categories on the basis of orientation selectivity testing. One group of penetrations contained at least one nonoriented cell in the first 600 microns of microelectrode trajectory (upper layers), whereas the other group of penetrations contained only oriented cells in the first 600 microns of microelectrode trajectory. The two groups were called N (nonoriented) and O (oriented), respectively. Analysis of the color properties of cells in N and O penetrations revealed that middle layer cells in N penetrations showed poor responses to white light, and color preferences for endspectral wavelengths, i.e., red or blue. Middle layer cells in O penetrations, by contrast, responded well to white light and to midspectral wavelengths. There were two subgroups of N penetrations, characterized by predominantly red (NR) or blue (NB) sensitivity in the middle layers. O penetrations could likewise be divided up into three subgroups (OG, OY, OW), characterized, respectively, by predominant sensitivity to greenish wavelengths (490-540 nm), yellowish wavelengths (550–600 nm), or white (i.e., all colors). Despite the identification of five subgroups, similarities between NR and OY, between NB and OG, and between OY and OW subgroups might be consistent with a continuum. The middle layers of N penetrations contained a unique class of cells with excitatory responses restricted to the two spectral ends, endspectral double-peak cells. A model is proposed for the color organization of layer 4 in foveal striate cortex, with red and blue zones in register with alternate cytochrome oxidase “blobs” of layers 2 and 3, white zones in register with interblob centers, and yellow and green zones in between.