Stimulus rivalry and binocular rivalry share a common neural substrate.
Stimulus rivalry and binocular rivalry share a common neural substrate.
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DOI：
10.1167/18.9.18
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发表时间：
2018-09-04
影响因子：
1.8
通讯作者：
He S
中科院分区：
文献类型：
--
作者：
Petruk V;He B;Engel S;He S
当两个不相容的图像分别显示给每只眼睛时，一个被称为双眼竞争的感知过程发生，两个图像竞争意识。竞争的双目竞争的网站一直是一个争论的话题，最近的理论是，它可能发生在低层次的视觉系统，其中来自两个眼睛的输入相结合，或在高层次的视觉系统，其中两个图像进行处理。一个主要的证据，为高层次的图像帐户的竞争是一种现象，称为刺激竞争，其中两个竞争的刺激之间交换的眼睛在3赫兹。然而，很少有神经生理学证据的神经基板，这种高层次的竞争。在这里，我们使用的频率标记的两个竞争刺激的双眼竞争和刺激竞争的人类，以评估是否稳态视觉诱发电位（SSVEP）显示类似的签名的神经竞争的两种条件。我们发现，闪烁的刺激产生的频谱功率在标记的频率在两种类型的竞争在早期的视觉皮层。然后，我们通过跟踪频率标签的振幅变化来量化竞争的动态特征，这表明两种类型的竞争共定位于大脑皮层的枕叶区域。因此，相反，我们的假设，刺激竞争是由高层次的图像之间的竞争介导的，我们发现，神经竞争测量的SSVEP，而不是表明，刺激竞争和双眼竞争的竞争的网站可能同样包括枕极和颞中回（hMT+/V5）的视觉系统，符合低层次，双眼的解释。
When two incompatible images are shown separately to each eye, a perceptual process known as binocular rivalry occurs by which the two images compete for awareness. The site of competition for binocular rivalry has been a topic of debate, and recent theories are that it may occur either at low levels of the visual system where the inputs from the two eyes are combined or at high levels of the visual system where the two images are processed. One of the major pieces of evidence for a high-level image account of rivalry is a phenomenon known as stimulus rivalry, in which two competing stimuli are swapped between the eyes at 3 Hz. However, there is little available neurophysiological evidence for a neural substrate for this high-level competition. Here, we used frequency tagging of two competing stimuli in binocular rivalry and stimulus rivalry in humans to evaluate whether the steady-state visually evoked potentials (SSVEPs) show similar signatures of neural competition for both conditions. We found that flickering the stimuli generates spectral power at the tagged frequencies in both types of rivalry in the early visual cortex. We then quantified dynamic signatures of competition by tracking amplitude changes in the frequency tags, which showed that both types of rivalry colocalized in occipital regions of the cortex. Thus, contrary to our hypothesis that stimulus rivalry was being mediated by high-level competition between the images, we find that neural competition measured by the SSVEP instead suggests that the sites of competition for stimulus rivalry and binocular rivalry may similarly include the occipital pole and middle temporal gyrus (hMT+/V5) of the visual system, consistent with a low-level, binocular interpretation.
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影响因子：
2
作者：
Davies, Martin
通讯作者：
Davies, Martin
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作者：
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