Beta oscillations correlate with the probability of perceiving rivalrous visual stimuli.
Beta oscillations correlate with the probability of perceiving rivalrous visual stimuli.
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DOI：
10.1167/10.13.18
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发表时间：
2010-11
影响因子：
1.8
通讯作者：
G. Piantoni;K. Kline;D. Eagleman
中科院分区：
文献类型：
--
作者：
G. Piantoni;K. Kline;D. Eagleman
在连续照明下，吊扇和车轮等移动刺激可能零星地出现反向移动--这种现象被称为幻觉运动反转(IMR)。我们之前已经提出，IMR是由于运动检测器的虚假激活而调向相反的运动方向，导致两种可能的运动知觉之间的竞争。为了确定这一假设是否得到电生理学证据的支持，我们使用EEG直接比较了IMR和双眼竞争(BR)的神经特征，BR是一种研究得很好的竞争形式。我们发现，在知觉转换时，IMR和BR在Beta范围(14-30赫兹)都显示出很大的功率变化。更重要的是，在稳定的知觉过程中，贝塔能量与知觉的概率相关。具体地说，与真实运动知觉相关的β功率(大部分时间都经历过)高于虚幻运动知觉中的功率(少数时间经历)。BR知觉，每个50%的可能性，与一个中间的β波幅相关。我们认为，同步的β活动的幅度反映了当前活跃的神经联盟的大小，较小的联盟不太可能与感知相关。
Under continuous lighting, moving stimuli such as ceiling fans and car wheels can sporadically appear to move in the reverse direction-this phenomenon is known as illusory motion reversal (IMR). We have previously suggested that IMR results from the spurious activation of motion detectors tuned for the opposite direction of motion, leading to a rivalry between two possible motion percepts. To determine if this hypothesis is supported by evidence from electrophysiology, we used EEG to directly compare neural signatures in IMR and binocular rivalry (BR), a well-studied form of rivalry. We find that both IMR and BR show large changes in power in the beta range (14-30 Hz) at the time of a perceptual switch. More importantly, during a stable perception, beta power correlates with the probability of a perception. Specifically, beta power associated with veridical motion perception (experienced the majority of the time) is higher than the power during illusory motion perception (experienced a minority of the time). The BR percepts, each 50% probable, are associated with an intermediate beta amplitude. We propose that the amplitude of synchronized beta activity reflects the size of currently active neural coalitions, with less likely percepts associated with smaller coalitions.