Ready, set, reset: stimulus-locked periodicity in behavioral performance demonstrates the consequences of cross-sensory phase reset.
Ready, set, reset: stimulus-locked periodicity in behavioral performance demonstrates the consequences of cross-sensory phase reset.
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DOI：
10.1523/jneurosci.1338-11.2011
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发表时间：
2011-07-06
期刊：
影响因子：
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通讯作者：
Molholm S
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文献类型：
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作者：
Fiebelkorn IC;Foxe JJ;Butler JS;Mercier MR;Snyder AC;Molholm S
在一种感觉模式中同时呈现刺激通常会增强另一种感觉模式中的目标检测，但支配这些效应的神经机制仍在研究中。在这里，我们测试神经生理学文献中提出的一个假设：视觉目标检测的听觉促进作用是通过正在进行的神经振荡的跨感觉相位重置来实现的（见）。到目前为止，测量的局限性阻止了这种潜在的强大神经机制与其预测的行为后果直接联系起来。本实验使用人类的心理物理学方法来证明，第一次，刺激锁定周期性的视觉目标检测，以下的时间信息的声音。我们的数据进一步表明，在行为表现的周期性的视听同现的概率有很大的影响。我们认为，视觉目标检测的波动是由跨感觉相位重置引起的，无论是在它发生的那一刻，还是在它发生后持续几秒钟。该周期性操作的精确频率仍有待通过允许更高采样率的方法来确定。
The simultaneous presentation of a stimulus in one sensory modality often enhances target detection in another sensory modality, but the neural mechanisms that govern these effects are still under investigation. Here we test a hypothesis proposed in the neurophysiologic literature: that auditory facilitation of visual-target detection operates through cross-sensory phase reset of ongoing neural oscillations (see). To date, measurement limitations have prevented this potentially powerful neural mechanism from being directly linked with its predicted behavioral consequences. The present experiment uses a psychophysical approach in humans to demonstrate, for the first time, stimulus-locked periodicity in visual-target detection, following a temporally informative sound. Our data further demonstrate that periodicity in behavioral performance is strongly influenced by the probability of audiovisual co-occurrence. We argue that fluctuations in visual-target detection result from cross-sensory phase reset, both at the moment it occurs and persisting for seconds thereafter. The precise frequency at which this periodicity operates remains to be determined through a method that allows for a higher sampling rate.