Interactions between surround suppression and interocular suppression in human vision.
Interactions between surround suppression and interocular suppression in human vision.
复制标题
人类视觉中周围抑制和眼间抑制之间的相互作用
DOI：
10.1371/journal.pone.0038093
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发表时间：
2012
期刊：
影响因子：
3.7
通讯作者：
Li CY
中科院分区：
文献类型：
--
作者：
Cai YC;Lu S;Li CY
在视觉系统中观察到了几种类型的抑制现象。例如，当目标被嵌入到高对比度的环境中时，检测目标刺激的能力通常会受到损害。这种被称为环绕抑制的语境调制，以前被认为只发生在外围。另一种类型的抑制现象是眼间抑制，在这种情况下，对单眼目标的敏感度会因对侧眼叠加的面罩而降低。在这里，我们探索了当这两种类型的抑制同时对出现在中心凹的共同目标施加抑制影响时，这两种类型的抑制如何跨越不同的空间区域相互作用。在我们的实验中，呈现在一只眼睛中心凹的圆形目标光栅被另一只眼睛相同大小的噪声图案所抑制。中心凹刺激要么单独显示，要么被单眼环形格栅包围。环绕光栅的取向和原点是不同的。我们发现，黄斑中心凹受眼间抑制的探测受到严重损害，这表明黄斑中心凹内存在强烈的环绕抑制。相反，当通过在目标和分视面罩上叠加双目融合环来释放眼间抑制时，发现环绕抑制效应显著降低。此外，发现环绕抑制依赖于分词噪声的对比度，只有当噪声对比度处于中等水平时，才能获得最大的环绕抑制效果。这些发现表明，周围抑制和眼间抑制并不是相互独立的，但它们之间存在着很强的交互作用。此外，我们的结果表明，强烈的环绕抑制也可能发生在中心凹，而不仅仅是周边。
Several types of suppression phenomena have been observed in the visual system. For example, the ability to detect a target stimulus is often impaired when the target is embedded in a high-contrast surround. This contextual modulation, known as surround suppression, was formerly thought to occur only in the periphery. Another type of suppression phenomena is interocular suppression, in which the sensitivity to a monocular target is reduced by a superimposed mask in the opposite eye. Here, we explored how the two types of suppression operating across different spatial regions interact with one another when they simultaneously exert suppressive influences on a common target presented at the fovea. In our experiments, a circular target grating presented to the fovea of one eye was suppressed interocularly by a noise pattern of the same size in the other eye. The foveal stimuli were either shown alone or surrounded by a monocular annular grating. The orientation and eye-of-origin of the surround grating were varied. We found that the detection of the foveal target subjected to interocular suppression was severely impaired by the addition of the surround grating, indicating strong surround suppression in the fovea. In contrast, when the interocular suppression was released by superimposing a binocular fusion ring onto both the target and the dichoptic mask, the surround suppression effect was found to be dramatically decreased. In addition, the surround suppression was found to depend on the contrast of the dichoptic noise with the greatest surround suppression effect being obtained only when the noise contrast was at an intermediate level. These findings indicate that surround suppression and interocular suppression are not independent of each other, but there are strong interactions between them. Moreover, our results suggest that strong surround suppression may also occur at the fovea and not just the periphery.
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影响因子：
1.8
作者：
Meese, Tim S.;Challinor, Kirsten L.;Baker, Daniel H.
通讯作者：
Baker, Daniel H.
影响因子：
1.8
作者：
Paffen, CLE;Tadin, D;Verstraten, FAJ
通讯作者：
Verstraten, FAJ
影响因子：
1.8
作者：
Paffen, CLE;van der Smagt, MJ;Verstraten, FAJ
通讯作者：
Verstraten, FAJ
影响因子：
1.8
作者：
Murakami, I;Shimojo, S
通讯作者：
Shimojo, S
影响因子：
1.8
作者：
Paffen, CLE;Alais, D;Verstraten, FA
通讯作者：
Verstraten, FA