Motion-induced blindness and Troxler fading: common and different mechanisms.
Motion-induced blindness and Troxler fading: common and different mechanisms.
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DOI：
10.1371/journal.pone.0092894
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Sagi D
中科院分区：
文献类型：
--
作者：
Bonneh YS;Donner TH;Cooperman A;Heeger DJ;Sagi D
凝视的延长稳定导致周边呈现的暗淡视觉目标的消失。这种现象被称为Troxler衰落，被认为是神经元适应的结果。强烈的目标也会在被移动的图案（“掩模”）包围时间歇性地消失，这种现象被称为运动诱导失明（MIB）。这些消失的类似现象学和动力学可能表明，MIB也是，同样，完全是由于适应，这可能是由面具的存在放大。在这里，我们直接比较了这两种现象对目标对比度的依赖性。观察者报告了不同强度的目标的消失和再现（对比度水平：8%-80%）。通过添加以各种不同速度之一移动的掩模来诱导MIB。结果表明，在MIB和Troxler衰落的对比度的法律效果，但与相反的趋势。增加目标对比度增加（加倍）MIB的消失事件的速率，但在Troxler衰落中将消失速率降低到一半。在MIB和Troxler衰落中，目标平均不可见周期随着目标对比度同样强烈地下降。结果表明，MIB和Troxler同样受到对比度适应的影响，但MIB的速率受一个额外的机制，可能涉及神经元群体处理目标和掩模之间的拮抗过程。我们的研究结果将MIB与其他涉及神经元竞争（如双眼竞争）的双稳态视觉现象联系起来，这些现象对竞争刺激成分的强度表现出类似的依赖性。
Extended stabilization of gaze leads to disappearance of dim visual targets presented peripherally. This phenomenon, known as Troxler fading, is thought to result from neuronal adaptation. Intense targets also disappear intermittently when surrounded by a moving pattern (the “mask”), a phenomenon known as motion-induced blindness (MIB). The similar phenomenology and dynamics of these disappearances may suggest that also MIB is, likewise, solely due to adaptation, which may be amplified by the presence of the mask. Here we directly compared the dependence of both phenomena on target contrast. Observers reported the disappearance and reappearance of a target of varying intensity (contrast levels: 8%–80%). MIB was induced by adding a mask that moved at one of various different speeds. The results revealed a lawful effect of contrast in both MIB and Troxler fading, but with opposite trends. Increasing target contrast increased (doubled) the rate of disappearance events for MIB, but decreased the disappearance rate to half in Troxler fading. The target mean invisible period decreased equally strongly with target contrast in MIB and in Troxler fading. The results suggest that both MIB and Troxler are equally affected by contrast adaptation, but that the rate of MIB is governed by an additional mechanism, possibly involving antagonistic processes between neuronal populations processing target and mask. Our results link MIB to other bi-stable visual phenomena that involve neuronal competition (such as binocular rivalry), which exhibit an analogous dependency on the strength of the competing stimulus components.
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影响因子：
5.3
作者：
Donner, Tobias H.;Sagi, Dov;Heeger, David J.
通讯作者：
Heeger, David J.
DOI：
10.1364/josaa.1.000216
发表时间：
1984-01-01
影响因子：
1.9
作者：
BURBECK, CA;KELLY, DH
通讯作者：
KELLY, DH
影响因子：
1.8
作者：
Libedinsky, Camilo;Savage, Tristram;Livingstone, Margaret
通讯作者：
Livingstone, Margaret
影响因子：
1.8
作者：
Noest, A. J.;van Ee, R.;van Wezel, R. J. A.
通讯作者：
van Wezel, R. J. A.
影响因子：
4.3
作者：
Gigante G;Mattia M;Braun J;Del Giudice P
通讯作者：
Del Giudice P