Center-surround inhibition deepens binocular rivalry suppression
Center-surround inhibition deepens binocular rivalry suppression
复制标题
DOI：
10.1016/j.visres.2005.04.018
复制
发表时间：
2005-09-01
期刊：
影响因子：
1.8
通讯作者：
Verstraten, FA
中科院分区：
文献类型：
--
作者：
Paffen, CLE;Alais, D;Verstraten, FA
当不同的刺激呈现给每只眼睛时，感知在两个图像之间交替，这种现象被称为双眼竞争。它已被证明，在竞争对手的目标附近的刺激调制的时间，每个目标是感知主导。例如，向竞争目标周围的区域呈现运动降低了同方向目标的优势。在这里，使用一个固定的同心光栅与漂移光栅相媲美，我们表明，漂移环绕光栅也增加了深度的双目竞争抑制，作为测量的灵敏度的竞争对手的光栅上的速度歧视探头。当环绕物与光栅沿相同方向移动时尤其如此，并且对于相反方向稍微较弱。在这两种情况下的抑制比无环绕控制条件更深。我们假设，环绕抑制经常观察到的区域MT（V5）-视觉运动感知的视觉区域牵连-是负责这种抑制的增加。为了支持这一假设，单眼和双眼周围都有效地增加抑制深度，因为周围对侧的探测眼睛。静态和正交运动环境未能增加竞争抑制的深度。这些结果暗示了一个更高层次的，完全双目区域，其周围抑制提供了一个额外的抑制源，与竞争抑制的总和，以有效地加深抑制一个看不见的竞争对手的目标。(c)2005爱思唯尔有限公司保留所有权利。
When dissimilar stimuli are presented to each eye, perception alternates between both images-a phenomenon known as binocular rivalry. It has been shown that stimuli presented in proximity of rival targets modulate the time each target is perceptually dominant. For example, presenting motion to the region surrounding the rival targets decreases the predominance of the same-direction target. Here, using a stationary concentric grating rivaling with a drifting grating, we show that a drifting surround grating also increases the depth of binocular rivalry suppression, as measured by sensitivity to a speed discrimination probe on the rival grating. This was especially so when the surround moved in the same direction as the grating, and was slightly weaker for opposed directions. Suppression in both cases was deeper than a no-surround control condition. We hypothesize that surround suppression often observed in area MT (V5)-a visual area implicated in visual motion perception-is responsible for this increase in suppression. In support of this hypothesis, monocular and binocular surrounds were both effective in increasing suppression depth, as were surrounds contralateral to the probed eye. Static and orthogonal motion surrounds failed to add to the depth of rivalry suppression. These results implicate a higher-level, fully binocular area whose surround inhibition provides an additional source of suppression which sums with rivalry suppression to effectively deepen suppression of an unseen rival target. (c) 2005 Elsevier Ltd. All rights reserved.