Stochastic resonance in binocular rivalry
Stochastic resonance in binocular rivalry
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DOI：
10.1016/j.visres.2005.08.009
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发表时间：
2006-02-01
期刊：
影响因子：
1.8
通讯作者：
Suzuki, S
中科院分区：
文献类型：
--
作者：
Kim, YJ;Grabowecky, M;Suzuki, S
当一张不同的图像呈现给每只眼睛时，视觉感知会自发地在两张图像之间交替--这种现象被称为双眼竞争。由于双眼竞争的特征是两个边缘稳定的知觉状态和自发的、显然是随机的在它们之间切换，因此人们推测知觉中的切换反映了一种结合了噪声的双势型计算结构。为了描述这种由噪声介导的机制，我们调查了刺激输入、神经适应和抑制性调制(被认为是感知开关的基础)是否以一种系统产生随机共振的方式与噪声相互作用。通过使双眼竞争受到跨越一定频率范围的弱周期性对比调制，我们证明了双眼竞争中随机共振的定量证据。我们的行为结果与计算模拟相结合，提供了对与感知转换相关的内部噪声(其幅度、轨迹和校准)的性质的见解，并为旨在捕获感知转换潜在神经机制的计算模型提供了新的动态约束。(C)2005爱思唯尔有限公司。保留所有权利。
When a different image is presented to each eye, visual awareness spontaneously alternates between the two images-a phenomenon called binocular rivalry. Because binocular rivalry is characterized by two marginally stable perceptual states and spontaneous, apparently stochastic, switching between them, it has been speculated that switches in perceptual awareness reflect a double-well-potential type computational architecture coupled with noise. To characterize this noise-mediated mechanism, we investigated whether stimulus input, neural adaptation, and inhibitory modulations (thought to underlie perceptual switches) interacted with noise in such a way that the system produced stochastic resonance. By subjecting binocular rivalry to weak periodic contrast modulations spanning a range of frequencies, we demonstrated quantitative evidence of stochastic resonance in binocular rivalry. Our behavioral results combined with computational simulations provided insights into the nature of the internal noise (its magnitude, locus, and calibration) that is relevant to perceptual switching, as well as provided novel dynamic constraints on computational models designed to capture the neural mechanisms underlying perceptual switching. (c) 2005 Elsevier Ltd. All rights reserved.