Geometry of orientation and ocular dominance columns in monkey striate cortex
Geometry of orientation and ocular dominance columns in monkey striate cortex
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DOI：
10.1523/jneurosci.13-10-04114.1993
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发表时间：
1993-10
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影响因子：
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通讯作者：
K. Obermayer;G. Blasdel
中科院分区：
文献类型：
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作者：
K. Obermayer;G. Blasdel
Hubel 和 Wiesel（1974a）除了表明眼睛优势是按平板组织的，并且方向偏好是以可能反映平板的线性序列组织的之外，还讨论了方向平板可能与眼睛优势平板以某个一致角度相交的有趣可能性。现在光学成像的进步使得直接测试这种可能性成为可能。当对方向图进行定量分析时，它们似乎是由至少两个相互竞争的主题组合而成：一种是方向偏好沿直轴线性变化，沿垂直轴保持恒定并沿途形成等方向板，另一种是方向偏好沿圆轴连续变化，沿径向轴保持恒定并在封闭空间的中心形成奇点。当将方向模式与来自相同皮质区域的眼优势模式进行比较时，定量测量显示（1）奇点往往位于眼优势柱的中心，（2）线性区域（在方向偏好沿直轴变化时出现）往往位于眼优势柱的边缘，以及（3）每个线性区域内的短等方向带倾向于以大约 90 度的角度与眼优势板的边界相交。
In addition to showing that ocular dominance is organized in slabs and that orientation preferences are organized in linear sequences likely to reflect slabs, Hubel and Wiesel (1974a) discussed the intriguing possibility that slabs of orientation might intersect slabs of ocular dominance at some consistent angle. Advances in optical imaging now make it possible to test this possibility directly. When maps of orientation are analyzed quantitatively, they appear to arise from a combination of at least two competing themes: one where orientation preferences change linearly along straight axes, remaining constant along perpendicular axes and forming iso-orientation slabs along the way, and one where orientation preferences change continuously along circular axes, remaining constant along radial axes and forming singularities at the centers of the spaces enclosed. When orientation patterns are compared with ocular dominance patterns from the same cortical regions, quantitative measures reveal (1) that singularities tend to lie at the centers of ocular dominance columns, (2) that linear zones (arising where orientation preferences change along straight axes) tend to lie at the edges of ocular dominance columns, and (3) that the short iso-orientation bands within each linear zone tend to intersect the borders of ocular dominance slabs at angles of approximately 90 degrees.