Binocular rivalry: A time dependence of eye and stimulus contributions
Binocular rivalry: A time dependence of eye and stimulus contributions
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DOI：
10.1167/10.12.3
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发表时间：
2010-01-01
影响因子：
1.8
通讯作者：
Logothetis, Nikos K.
中科院分区：
文献类型：
--
作者：
Bartels, Andreas;Logothetis, Nikos K.
在双眼竞争中，视觉知觉在两个双眼呈现的刺激之间随机交替。现已确定，与起源眼相关的过程和与双眼、刺激相关的过程都可以解释意识知觉的这些波动。在这里，我们研究了它们的相对贡献如何随时间变化。我们在一个刺激变得可见(占主导地位)后，以不同的时间间隔对竞争显示进行短暂的干扰，同时进行可选的眼神交换。我们发现，在优势阶段的早期，优势眼通过稳定自己的贡献来决定知觉(不管刺激是什么)，还有一个额外的但更弱的稳定贡献(不管眼睛)。它们的稳定作用随着时间的推移而下降，因此在优势阶段的后期，刺激(在某些情况下也是基于眼睛)的贡献变为负值，有利于知觉(或眼睛)的转换。我们的发现表明，根据时间的不同，首先与起源眼有关的过程，然后与刺激有关的过程，可以对意识知觉的稳定性产生更大的净影响。它们的协变变化可能是由于从图像到原点眼睛表征的反馈。
In binocular rivalry, the visual percept alternates stochastically between two dichoptically presented stimuli. It is established that both processes related to the eye of origin and binocular, stimulus-related processes account for these fluctuations in conscious perception. Here we studied how their relative contributions vary over time. We applied brief disruptions to rivalry displays, concurrent with an optional eye swap, at varying time intervals after one stimulus became visible (dominant). We found that early in a dominance phase the dominant eye determined the percept by stabilizing its own contribution (regardless of the stimulus), with an additional yet weaker stabilizing contribution of the stimulus (regardless of the eye). Their stabilizing contributions declined in parallel with time so that late in a dominance phase the stimulus (and in some cases also the eye-based) contribution turned negative, favoring a perceptual (or ocular) switch. Our findings show that depending on the time, first processes related to the eye of origin and then those related to the stimulus can have a greater net influence on the stability of the conscious percept. Their co-varying change may be due to feedback from image-to eye-of-origin representations.