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首页> 美国卫生研究院文献>The Journal of Neuroscience >The Continuous Wagon Wheel Illusion Is Associated with Changes in Electroencephalogram Power at ∼13 Hz
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The Continuous Wagon Wheel Illusion Is Associated with Changes in Electroencephalogram Power at ∼13 Hz

机译：连续货车车轮错觉与〜13 Hz时的脑电图功率变化相关

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摘要

Continuously moving objects sometimes appear to spontaneously reverse their motion direction. The mechanisms underlying this bistable phenomenon (the “continuous wagon wheel illusion”) are heavily debated, but one interpretation suggests that motion information is perceived in discrete episodes at a rate between 10 and 15 Hz. Here, we asked observers to report the perceived direction of a continuously rotating wheel while 32-channel electroencephalogram (EEG) was recorded. We then separated periods of perceived true from illusory (reversed) motion and compared the EEG power spectrum under these two perceptually distinct yet physically identical conditions. The only reliable difference was observed ∼13 Hz over centroparietal electrodes, independent of the temporal frequency of the wheel. Thus, it is likely to reflect internal processes rather than purely stimulus-driven activity. EEG power (13 Hz) decreased before the onset of illusory motion and increased before transitions back to real motion. Using this relationship, it was possible to predict above chance, on a trial-by-trial basis, the direction of the upcoming perceptual transition. These data are compatible with the idea that motion perception occurs in snapshots <100 ms in duration.
机译：连续移动的物体有时看起来会自发地反转其运动方向。这种双稳态现象（“连续的车轮错觉”）背后的机制受到了激烈的争论，但一种解释表明，运动信息在离散事件中以10至15 Hz的频率被感知。在这里，我们要求观察者报告在记录32通道脑电图（EEG）的同时不断旋转的车轮的方向。然后，我们从虚幻（反向）运动中分离出了感知的真实时间段，并比较了这两种在感知上截然不同但在物理上相同的条件下的脑电图谱。观察到的唯一可靠的差异是在方向盘电极上约13 Hz，与车轮的时间频率无关。因此，它可能反映了内部过程，而不是纯粹由刺激驱动的活动。脑电功率（13 Hz）在虚幻运动开始之前降低，而在转变回真实运动之前升高。利用这种关系，有可能在逐个试验的基础上预测即将到来的感知转变的方向。这些数据与运动感知发生在持续时间小于100毫秒的快照中的想法兼容。

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