Intracranial Recordings of Occipital Cortex Responses to Illusory Visual Events
Intracranial Recordings of Occipital Cortex Responses to Illusory Visual Events
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DOI：
10.1523/jneurosci.0242-15.2016
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发表时间：
2016-06-08
影响因子：
5.3
通讯作者：
van Ee, Raymond
中科院分区：
文献类型：
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作者：
de Jong, Maartje C.;Hendriks, Ralph J. M.;van Ee, Raymond
随着时间的推移，模糊的视觉刺激会引发不同的感知解释，从而产生一种持续刺激正在变化的错觉。我们研究了视觉感知的这种自发变化是否涉及专门用于处理视觉信息的枕叶区域，尽管没有伴随的刺激变化。将在观看双眼竞争刺激或模糊的运动结构刺激时观察到的自发知觉变化与响应于实际刺激变化而发生的刺激引起的知觉变化进行比较。人类枕叶皮层的颅内记录显示，自发的和刺激引起的知觉变化都与高频功率的早期瞬时增加有关，与低频功率的后期瞬时减少相比，高频功率在空间上受到更多限制。我们认为观察到的高频和低频调制分别与感知的启动和维持有关。我们的结果与感知的自发变化源于视觉神经网络内的竞争性相互作用的观点相一致。
Ambiguous visual stimuli elicit different perceptual interpretations over time, creating the illusion that a constant stimulus is changing. We investigate whether such spontaneous changes in visual perception involve occipital brain regions specialized for processing visual information, despite the absence of concomitant changes in stimulation. Spontaneous perceptual changes observed while viewing a binocular rivalry stimulus or an ambiguous structure-from-motion stimulus were compared with stimulus-induced perceptual changes that occurred in response to an actual stimulus change. Intracranial recordings from human occipital cortex revealed that spontaneous and stimulus-induced perceptual changes were both associated with an early transient increase in high-frequency power that was more spatially confined than a later transient decrease in low-frequency power. We suggest that the observed high-frequency and low-frequency modulations relate to initiation and maintenance of a percept, respectively. Our results are compatible with the idea that spontaneous changes in perception originate from competitive interactions within visual neural networks.