CENTRIPETAL AND CENTRIFUGAL VISUAL CELLS IN MEDULLA OF INSECT OPTIC LOBE
CENTRIPETAL AND CENTRIFUGAL VISUAL CELLS IN MEDULLA OF INSECT OPTIC LOBE
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DOI：
10.1152/jn.1970.33.2.239
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发表时间：
1970-01-01
影响因子：
2.5
通讯作者：
COLLETT, T
中科院分区：
文献类型：
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作者：
COLLETT, T
直到最近，昆虫视叶组织的生理学研究一直因缺乏详细的解剖学描述而受到极大的阻碍。Strausfeld和Blest基于高尔基体制备的描述（20，21）大大增加了Cajal和Sanchez（6）和Zawarzin（27）的描述。它提供了足够的信息，以确定一些形态分类的细胞类型的电活动.本文报道了天蛾Sphinx 1iqustG延髓中几个较大细胞的视觉特性和脉冲交通方向的测定。c关于昆虫视叶的完整描述可在Strausfeld和Blest的论文中找到;这里给出一个简要的概要。视叶有三个主要的神经桩区域：椎板、髓质和小叶复合体（图1）。在鳞翅目中，后者分为两个区域，小叶和小叶板。大多数突触相互作用可能发生在这些区域内。椎板直接位于视网膜下方，接受小眼排列的有序投影。来自板层的二级纤维和来自视网膜的一些长的一级纤维一起将arrav映射到髓质上。板层与髓质之间的交叉使排列层翻转180 °。三级纤维通过第二交叉将阵列投射到小叶复合体。参与这一投射接力的神经元被称为垂直细胞。它们的分支在整个阵列中的横向扩展相对较小，与第二类主要的视叶细胞（切向细胞）相反。
UNTIL RECENTLY physiological studies of the organization of the insect optic lobe have been greatly handicapped by the poverty of detailed anatomical description. Strausfeld and Blest’s account (20, 21), based on Golgi preparations, has added substantially to those of Cajal and Sanchez (6) and Zawarzin (27). It ‘provides sufficient information to identify the electrical activity of some morphologically classified cell types. The present paper reports an attempt to determine the visual properties and the direction of impulse traffic of a few of the larger cells in the medulla of the hawkmoth, Sphinx 1iqustG. cA full description of the insect optic lobe is to be found in the papers by Strausfeld and Blest; a brief synopsis is given here. There are three main neuropile regions of the optic lobe: the lamina, the medulla, and the lobula complex (Fig. 1). In Lepidoptera the latter is divided into two areas, the lobula and lobula plate. The majority of synaptic interactions probably occurs within these areas. The lamina lies directly under the retina and receives an ordered projection of the ommatidial array. Second-order fibers from the lamina, together with some long first-order fibers from the retina map the arrav onto the medulla. A chiasma between the lamina and medulla inverts the array horizon tally through 180 O. Thirdorder fibers project the array to the lobula complex via a second chiasma. The neurons concerned in this relay of projections have been called perpendicular cells. Their branches have relatively little lateral spread across the array, in contrast to the second main class of optic lobe cells, tangential cells.