VISUAL TOPOGRAPHY OF V1 IN THE CEBUS MONKEY
VISUAL TOPOGRAPHY OF V1 IN THE CEBUS MONKEY
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DOI：
10.1002/cne.902590404
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发表时间：
1987-05-22
影响因子：
2.5
通讯作者：
ROSA, MGP
中科院分区：
文献类型：
--
作者：
GATTASS, R;SOUSA, APB;ROSA, MGP
用 Cebus 猴的多单元电极绘制了纹状皮层 (VI) 视野的表征。在重复记录过程中研究了用 N2O 麻醉并用溴化泮库溴固定的 9 个 Cebus apella。在每个半球中，VI包含对侧视觉半场的连续表示。垂直子午线(VM)的表示形成了VI的外部边界，除了距距裂的最前部分。水平子午线 (HM) 的表示将区域划分为使下视野的表示位于背侧，而上视野的表示位于腹侧。 VI的卷积表面只能部分展开，并且在不引入表面不连续性的情况下无法获得精确的“展平”图。 VI 的视觉地形以一系列冠状剖面和“扁平化”地图呈现。在VI中，中心视野的表示相对于周边视野被放大。对部分展开的V1模型中沿等偏心和等极维度测量的皮质放大系数的评估揭示了视野表示中的各向异性，沿等极线的放大倍数比沿等偏心线的放大倍数更大。感受野大小随着偏心率的增加而增加，而点图像的大小随着偏心率的增加而减小。
The representation of the visual field in the striate cortex (VI) was mapped with multiunit electrodes in the Cebus monkey. Nine Cebus apella, anesthetized with N2O and immobilized with pancuromium bromide were studied in repeated recording sessions. In each hemisphere, Vl contains a continuous representation of the contralateral visual hemifield. The representation of the vertical meridian (VM) forms the external border of Vl except at the anteriormost portion of the calcarine fissure. The representation of the horizontal meridian (HM) divides the area so that the representation of the lower visual field is located dorsally, and that of the upper field ventrally. The convoluted surface of Vl can be only partially unfolded, and no precise "flattened" map can be obtained without introducing surface discontinuities. The visual topography of Vl is presented in a series of coronal sections and in "flattened" maps. The representation of the central visual field is magnified relative to that of the periphery in Vl. The evaluation of the cortical magnification factors measured along isoeccentric and isopolar dimensions in the partially unfolded model of Vl revealed anisotropies in the representation of the visual field with larger magnification along isopolar lines than along isoeccentric lines. Receptive field size increases with increasing eccentricity, whereas point image size decreases with increasing eccentricity.