Right Parietal Brain Activity Precedes Perceptual Alternation During Binocular Rivalry
Right Parietal Brain Activity Precedes Perceptual Alternation During Binocular Rivalry
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DOI：
10.1002/hbm.21117
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发表时间：
2011-09-01
影响因子：
4.8
通讯作者：
Michel, Christoph M.
中科院分区：
文献类型：
--
作者：
Britz, Juliane;Pitts, Michael A.;Michel, Christoph M.
我们研究了在双眼竞争和身体交替过程中间歇性呈现刺激的知觉反转，同时记录了64个通道的持续EEG。EEG地形图前刺激发作进行了分析和两个地形图双重分离的知觉反转从非反转。估计颅内发电机与这些地形较强的右下顶叶皮层和较弱的两侧在腹侧流知觉逆转之前。相同刺激的物理交替没有发现这样的差异。这些结果复制和扩展的研究结果从以前的研究与内克尔立方体，并提出共同的神经机制与知觉逆转在双目竞争和模糊的数字感知。对于这两种类型的多稳态刺激，背流是更积极的知觉逆转之前。活动在腹侧流，然而，不同的双眼竞争相比，模糊的数字。这两项研究的结果表明，右下顶叶皮层在产生知觉逆转中起着因果作用，而不管多稳态刺激的类型如何，而腹侧流的活动似乎取决于特定类型的刺激。《脑地图》32：1432-1442，2011年。(C)2010 Wiley-Liss，Inc.
We investigated perceptual reversals for intermittently presented stimuli during binocular rivalry and physical alternation while the ongoing EEG was recorded from 64 channels. EEG topographies immediately preceding stimulus-onset were analyzed and two topographies doubly dissociated perceptual reversals from non-reversals. The estimated intracranial generators associated with these topographies were stronger in right inferior parietal cortex and weaker bilaterally in the ventral stream before perceptual reversals. No such differences were found for physical alternation of the same stimuli. These results replicate and extend findings from a previous study with the Necker cube and suggest common neural mechanisms associated with perceptual reversals during binocular rivalry and ambiguous figure perception. For both types of multi-stable stimuli, the dorsal stream is more active preceding perceptual reversals. Activity in the ventral stream, however, differed for binocular rivalry compared to ambiguous figures. The results from the two studies suggest a causal role for the right inferior parietal cortex in generating perceptual reversals regardless of the type of multi-stable stimulus, while activity in the ventral stream appears to depend on the particular type of stimulus. Hum Brain Mapp 32:1432-1442, 2011. (C) 2010 Wiley-Liss, Inc.