Binocular cross-orientation suppression in the cat's striate cortex.
Binocular cross-orientation suppression in the cat's striate cortex.
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DOI：
10.1152/jn.1998.79.1.227
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发表时间：
1998
影响因子：
2.5
通讯作者：
G. Walker;I. Ohzawa;R. D. Freeman
中科院分区：
文献类型：
--
作者：
G. Walker;I. Ohzawa;R. D. Freeman
当皮层细胞被最佳正弦光栅激活时，其响应可以被与最佳刺激正交取向的叠加的第二光栅衰减。这种效应被称为交叉取向抑制（COS）。在以前的工作中，单眼的特点进行了探讨，并进行了眼间测试，试图找到抑制的起源。在这项研究中，我们已经记录了从皮层细胞外的COS调查的双眼特征。我们的假设是，双眼视差影响的效果的强度。我们的结果不支持这一假设。我们发现，双目COS是一样强的单眼COS，但视差变化是没有后果的。我们还进行了两眼间的测试，其中最佳光栅和正交掩模被看到由不同的眼睛。虽然大多数眼间效应都很弱，但它们几乎存在于每个细胞中，并且跨越了广泛的抑制强度。我们还测试了最佳和正交光栅的异步呈现的效果。这些时间偏移并不影响COS的强度。我们的结论是，抑制机制的COS主要是单眼和行动之前的收敛的两个单眼流。
When a cortical cell is activated by an optimal sinusoidal grating, its response can be attenuated by a superimposed second grating oriented orthogonally to the optimal stimulus. This effect is known as cross-orientation suppression (COS). In previous work, monocular characteristics have been explored and interocular tests have been conducted in an attempt to locate the origin of the suppression. In this study, we have recorded extracellularly from cortical cells to investigate the binocular characteristics of COS. Our hypothesis is that binocular disparity influences the strength of the effect. Our results do not support this supposition. We find that binocular COS is as strong as monocular COS, but disparity changes are of no consequence. We also conducted interocular tests in which the optimal grating and the orthogonal mask were seen by separate eyes. Although most interocular effects were weak, they were present in almost every cell and spanned a wide range of suppression strengths. We also tested the effect of asynchronous presentation of optimal and orthogonal gratings. These temporal offsets did not affect the strength of COS. We conclude that the suppressive mechanism underlying COS is primarily monocular and acts prior to the convergence of the two monocular streams.