Individual differences in alpha frequency drive crossmodal illusory perception.
Individual differences in alpha frequency drive crossmodal illusory perception.
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DOI：
10.1016/j.cub.2014.11.034
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发表时间：
2015-01-19
期刊：
影响因子：
--
通讯作者：
Romei V
中科院分区：
文献类型：
--
作者：
Cecere R;Rees G;Romei V
知觉通常整合来自不同感官的输入。刺激时间接近性关键地决定了这些输入是否绑定在一起。尽管时间整合窗口是一个被广泛接受的概念，但其神经生理基础仍不清楚。许多类型的常见视听相互作用发生在约100毫秒的时间窗口内。例如，在声音诱导的双闪错觉中，当两次蜂鸣声和一次闪光在约100毫秒内同时出现时，通常会感知到第二次错觉闪光。由于其固有的节律性，大脑振荡是控制整合时间窗口的一个候选机制。有趣的是，枕α波段振荡周期平均为每~ 100毫秒，峰值频率范围为8至14赫兹（即120-60毫秒周期）。此外，呈现一个简短的音调可以在视觉皮层中对这种振荡进行相位重置。基于这些观察，我们假设每个α周期的持续时间可能提供了绑定视听事件的时间单位。在此，我们首先记录了参与者在执行声音诱导的双闪错觉任务时的脑电图，发现个体α频率（IAF）峰值与错觉的时间窗大小呈正相关。然后，参与者在接受枕部经颅交流电刺激（tACS）的同时执行相同的任务，以调节其IAF或非峰α频率（IAF±2 Hz）的振荡活动。与IAF - 2 Hz和IAF+2 Hz的tACS相比，IAF−2 Hz和IAF+2 Hz的tACS分别放大和缩小了幻觉的时间窗口，这表明α振荡可能代表了视觉加工的时间单元，它周期性地打开了感知和促进视听相互作用的神经生理基质。α频率峰预测双闪幻觉的时间窗口，围绕α频率调谐的tACS对这个虚幻的时间窗口进行了有原因的调节。tACS α频率变慢或变快，幻觉时间窗口变大或缩小。α频率峰是驱动视觉加工跨模态影响的“指纹”。Cecere等人发现了这一现象的神经生理学相关性。枕叶α带内的个体振荡频率决定了个体跨感觉整合的时间分布，设定了有意识知觉体验的感觉节奏。
Perception routinely integrates inputs from different senses. Stimulus temporal proximity critically determines whether or not these inputs are bound together. Despite the temporal window of integration being a widely accepted notion, its neurophysiological substrate remains unclear. Many types of common audio-visual interactions occur within a time window of ∼100 ms. For example, in the sound-induced double-flash illusion, when two beeps are presented within ∼100 ms together with one flash, a second illusory flash is often perceived. Due to their intrinsic rhythmic nature, brain oscillations are one candidate mechanism for gating the temporal window of integration. Interestingly, occipital alpha band oscillations cycle on average every ∼100 ms, with peak frequencies ranging between 8 and 14 Hz (i.e., 120–60 ms cycle). Moreover, presenting a brief tone can phase-reset such oscillations in visual cortex. Based on these observations, we hypothesized that the duration of each alpha cycle might provide the temporal unit to bind audio-visual events. Here, we first recorded EEG while participants performed the sound-induced double-flash illusion task and found positive correlation between individual alpha frequency (IAF) peak and the size of the temporal window of the illusion. Participants then performed the same task while receiving occipital transcranial alternating current stimulation (tACS), to modulate oscillatory activity either at their IAF or at off-peak alpha frequencies (IAF±2 Hz). Compared to IAF tACS, IAF−2 Hz and IAF+2 Hz tACS, respectively, enlarged and shrunk the temporal window of illusion, suggesting that alpha oscillations might represent the temporal unit of visual processing that cyclically gates perception and the neurophysiological substrate promoting audio-visual interactions. Peak α frequency predicts temporal windows of the double-flash illusion tACS tuned around α frequency causally modulates this illusory temporal window Slower versus faster tACS α frequencies enlarged versus shrunk the illusory temporal window α peak is the “fingerprint” driving crossmodal impact upon visual processing Multisensory integration occurs within a critical temporal window. Cecere et al. discover the neurophysiological correlates of this phenomenon. Individual oscillatory frequency within the occipital α band causally determines the individual temporal profile of cross-sensory integration, setting the sensory pace of conscious perceptual experience.
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影响因子：
2.9
作者：
Klimesch W
通讯作者：
Klimesch W
影响因子：
1.7
作者：
Romei, Vincenzo;Rihs, Tonia;Thut, Gregor
通讯作者：
Thut, Gregor
DOI：
10.1523/jneurosci.4524-09.2010
发表时间：
2010-10-13
期刊：
The Journal of neuroscience : the official journal of the Society for Neuroscience
影响因子：
--
作者：
Noesselt T;Tyll S;Boehler CN;Budinger E;Heinze HJ;Driver J
通讯作者：
Driver J
影响因子：
25
作者：
Morrone, MC;Ross, J;Burr, D
通讯作者：
Burr, D
影响因子：
3.7
作者：
Martuzzi, Roberto;Murray, Micah M.;Meuli, Reto A.
通讯作者：
Meuli, Reto A.