Unraveling adaptation and mutual inhibition in perceptual rivalry
Unraveling adaptation and mutual inhibition in perceptual rivalry
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DOI：
10.1167/6.4.1
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发表时间：
2006-01-01
影响因子：
1.8
通讯作者：
Lankheet, Martin J. M.
中科院分区：
文献类型：
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作者：
Lankheet, Martin J. M.
当视觉系统在视野的同一部分遇到不相容的图像时，意识知觉会在相互竞争的刺激之间来回切换。这种自发的翻转为了解视觉感知的神经元基础提供了重要线索。一般的想法是，在相互抑制的过程中，两个表征争夺主导地位，在这个过程中，适应来回改变平衡。然而，竞争性触发器固有的非线性性质及其随机行为，使得抑制和适应不可能分开。在这里，我们报告了一种测量知觉竞争中涉及的机制的时间进程和不对称性的一般方法。在模型仿真的支持下，我们展示了对手相互抑制和适应之间的相互作用的动力学。这些发现不仅为了解竞争背后的机制提供了新的见解，也为研究和比较大脑中广泛的双稳态过程及其与视觉意识的关系提供了新的机会。
When the visual system is confronted with incompatible images in the same part of the visual field, the conscious percept switches back and forth between the rivaling stimuli. Such spontaneous flips provide important clues to the neuronal basis for visual awareness. The general idea is that two representations compete for dominance in a process of mutual inhibition, in which adaptation shifts the balance to and fro. The inherent nonlinear nature of the rivalrous flip-flop and its stochastic behavior, however, made it impossible to disentangle inhibition and adaptation. Here we report a general method to measure the time course, and asymmetries, of mechanisms involved in perceptual rivalry. Supported by model simulations, we show the dynamics of opponent interactions between mutual inhibition and adaptation. The findings not only provide new insight into the mechanism underlying rivalry but also offer new opportunities to study and compare a wide range of bistable processes in the brain and their relation to visual awareness.