Nonlinear SSVEP responses are sensitive to the perceptual binding of visual hemifields during conventional 'eye' rivalry and interocular 'percept' rivalry.
Nonlinear SSVEP responses are sensitive to the perceptual binding of visual hemifields during conventional 'eye' rivalry and interocular 'percept' rivalry.
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DOI：
10.1016/j.brainres.2008.09.086
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发表时间：
2009-01-28
期刊：
影响因子：
2.9
通讯作者：
Srinivasan R
中科院分区：
文献类型：
--
作者：
Sutoyo D;Srinivasan R
我们进行了行为和脑电图实验，以确定两种类型的双眼竞争中感知结合的生理相关性：(1)传统的“眼睛”竞争，在每只眼睛呈现的两个单眼图像之间交替感知；(2)眼间的“感知”竞争，在每只眼睛的互补半视野分组形成的感知之间交替感知。我们采用了“频率标记”，通过在每只眼睛的每个半视野中以不同的频率闪烁光栅来引发每只眼睛的每个半视野特定的SSVEP反应。当两眼互补视野中的光栅在颜色和方向上一致时，观察到的眼间“感知”竞争与传统“眼睛”竞争的概率大致相等。闪烁光栅引起的SSVEP仅在传统的“眼睛”竞争中被后电极和额电极的有意识知觉增强，而在眼间“感知”竞争中则没有，这表明单眼优势是大多数有意识知觉调节SSVEP的基础。我们还观察到四个基频和处的非线性SSVEP响应。这些组合反应仅由互补的视觉半球中的闪烁产生——在同一只眼睛或眼睛之间，但从不由占据同一视野的眼睛之间的不一致闪烁光栅产生，这表明它们与视觉半球（单眼或眼间）结合成连贯的感知有关。这些组合反应是由观察者所经历的竞争类型调节的，而不是由特定的意识知觉调节的。在双眼竞争中，即使只有一个感知被有意识地感知，也会发生与两种竞争感知的感知结合相关的神经过程。这表明传统的“眼睛”竞争和眼间的“感知”竞争都涉及感知之间的竞争。
We conducted behavioral and EEG experiments to identify physiological correlates of perceptual binding during two types of binocular rivalry: (1) conventional ‘eye’ rivalry where perception alternates between the two monocular images presented one to each eye and (2) interocular ‘percept’ rivalry, where perception alternates between percepts formed by grouping complementary hemifields one from each eye. We employed ‘frequency-tagging’ by flickering a grating in each hemifield of each eye at different frequencies to elicit SSVEP responses specific to each hemifield of each eye. When the gratings in complementary visual fields of the two eyes were congruent in color and orientation, robust interocular ‘percept’ rivalry was observed with roughly equal probability to conventional ‘eye’ rivalry. The SSVEPs evoked by the flickering gratings were enhanced by conscious perception at both posterior and frontal electrodes only during conventional ‘eye’ rivalry and not during interocular ‘percept’ rivalry, suggesting that dominance of one eye is the basis of most previous reports of SSVEP modulation by conscious perception. We also observed nonlinear SSVEP responses at the sums of our four fundamental frequencies. These combination responses were only produced by flicker in complementary visual hemifields – in the same eye or across eyes, but never by incongruent flickering gratings that occupy the same visual field across eyes, suggesting that they are related to the binding of the visual hemifields (monocular or interocular) into a coherent percept. These combination responses were modulated by the type of rivalry experienced by the observer, but not by the specific conscious perception. Neural processes related to perceptual binding of both rival percepts take place during binocular rivalry even when only one percept is consciously perceived. This suggests that conventional ‘eye’ and interocular ‘percept’ rivalry both involve competition between percepts.
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DOI：
10.1073/pnas.94.23.12699
发表时间：
1997-11-11
影响因子：
11.1
作者：
Fries, P;Roelfsema, PR;Singer, W
通讯作者：
Singer, W
影响因子：
64.8
作者：
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通讯作者：
Logothetis, NK
影响因子：
1.7
作者：
Kaernbach, C;Schröger, E;Roeber, U
通讯作者：
Roeber, U
影响因子：
56.9
作者：
LANSING, RW
通讯作者：
LANSING, RW
影响因子：
1.8
作者：
Lee, SH;Blake, R
通讯作者：
Blake, R