The third visual complex of rhesus monkey prestriate cortex.
The third visual complex of rhesus monkey prestriate cortex.
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恒河猴前纹状皮层的第三视觉复合体。
DOI：
10.1113/jphysiol.1978.sp012271
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发表时间：
1978
期刊：
影响因子：
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通讯作者：
S. Zeki
中科院分区：
文献类型：
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作者：
S. Zeki
1. 两个独立但相邻的视觉区域，V3 和 V3A，共享一个共同的细胞结构平面，但在每个视觉区域中，视野是单独表示的，已经在解剖学、功能学和解剖生理学联合实验中进行了研究。 2. 根据本研究中使用的技术判断，两个区域中的单个细胞的特性非常相似，以至于通常无法判断任何一个渗透是否是从 V3 或 V3A 中的细胞采样的。如果细胞在下半象限具有感受野，则尤其如此，因为下视野的垂直子午线沿着 V3-V3A 边界表示，并且沿着该边界从 V3 到 V3A 的过渡并不伴随细胞感受野位置的变化。 3. 由于包括垂直经线在内的视野分别在这两个区域中表示，并且由于垂直经络表示的区域是胼胝体相连的，因此指定 V3 和 V3A 之间边界的一种简单而确定的方法是检查胼胝体压部以下部分的变性。然后，严重的退化斑块标志着 V3-V3A 边界。然而，在这个补丁中，有一个子补丁包含较少的胼胝体纤维，或者根本没有。 V3 和 V3A 之间的边界被视为在此子补丁处。 4. 由于水平经线在 V2-V3 边界处表示，并且由于 V1 投影到这两个区域，将粗纤维发送到 V3，将细纤维发送到 V2，因此发现，通过在 V1 中的水平经线表示中进行损伤并注意在前纹状皮层中细纤维让位于粗纤维的位置，可以精确地绘制 V2 和 V3 之间的边界，而无需中间间隙。 5.双示踪剂解剖实验，其中将氚化脯氨酸注射到胼胝体压部已被切片的动物的V1中，表明V3接收来自V1的直接输入，而V3A则不接收。相反，V3A 被发现接收来自 V3 的输入。进行双示踪剂解剖实验来研究从 V2 到 V3A 的可能输入。尽管这些实验没有揭示从 V2 到 V3A 的直接输入，但它们并不完全是结论性的。 6. V3和V3A中的绝大多数细胞是双眼驱动的，没有明显的单眼偏好。然而，一些细胞虽然对单眼刺激做出反应，但却总结了它们对双眼刺激的反应。其他人只有在双眼同时受到刺激时才会做出反应。在任何倾斜渗透中，偏好双眼刺激的细胞仅单独或成组发生。 7. 在倾斜渗透中，从仅对双眼刺激做出反应的细胞转变为对任一眼睛的刺激做出同样良好反应的细胞，并不一定伴随着方向偏好的转变，前者的转变……
1. Two independent but neighbouring visual areas, V3 and V3A, sharing a common cytoarchitectural plan, but in each one of which the visual fields are separately represented, have been studied anatomically, functionally, and in combined anatomico‐physiological experiments. 2. The properties of single cells in the two areas are so similar, judged by the techniques used in this study, that it is often impossible to tell whether any one penetration was sampling from cells in V3 or V3A. This is especially so if the cells have receptive fields in the lower hemi‐quadrants, since the vertical meridian of the lower visual fields is represented along the V3‐V3A boundary and since a transition from V3 to V3A along this border is not accompanied by a shift in receptive field positions of cells. 3. Since the visual fields, including the vertical meridian, are separately represented in these two areas, and since regions of vertical meridian representation are callosally connected, a simple and certain method of specifying the boundary between V3 and V3A is to examine the degeneration following section of the callosal splenium. A heavy patch of degeneration then marks the V3‐V3A boundary. Within this patch, however, is a sub‐patch containing fewer callosal fibres, or none at all. The boundary between V3 and V3A was taken to be at this subpatch. 4. Since the horizontal meridian is represented at the V2‐V3 boundary, and since V1 projects to both these areas, sending coarse fibres to V3 and fine fibres to V2, it was found that the boundary between V2 and V3 could be precisely drawn by making a lesion in the horizontal meridian representation in V1 and noting where, in the prestriate cortex, fine fibres give way to coarse ones, without an intervening gap. 5. Double tracer anatomical experiments, in which tritiated proline was injected into V1 of animals whose callosal splenium had been sectioned, showed that whereas V3 receives a direct input from V1, V3A does not. V3A, instead, was found to receive an input from V3. Double tracer anatomical experiments were undertaken to study a possible input from V2 to V3A. Although such experiments did not reveal a direct input from V2 to V3A, they were not entirely conclusive. 6. The vast majority of cells in V3 and V3A were binocularly driven, without obvious monocular preferences. Some cells, however, though responding to stimulation of the individual eyes, summated their responses to binocular stimulation. Others responded only when both eyes were simulataneously stimulated. In any oblique penetration, cells preferring binocular stimulation only occurred either singly or in groups. 7. In an oblique penetration, the shift from a cell responding to binocular stimulation only to one responding equally well to stimulation of either eye was not necessarily accompanied by a shift in orientational preferences, shifts in the former...