Attentional rhythmic blink: Theta/Alpha balance in neural oscillations determines the rhythmicity in visual sampling

Attentional rhythmic blink: Theta/Alpha balance in neural oscillations determines the rhythmicity in visual sampling
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注意节律性眨眼:神经振荡中的 Theta/Alpha 平衡决定了视觉采样的节律性

DOI:
10.1101/2022.04.15.488436
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发表时间:
2022
期刊:
bioRxiv
影响因子:
--
通讯作者:
Amano Kaoru
Amano Kaoru
中科院分区:
--
文献类型:
--
作者:
Kawashima Tomoya;Hayashi Masamichi J;Amano Kaoru

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大脑在 θ(3-7 Hz)和 α(7-13 Hz)频段的振荡与视觉感知和注意力有关。我们表明,在注意力瞬脱范式中,任务需要检测快速连续出现的两个目标,知觉表现随着这两个频率的节奏而变化,我们将其称为注意节奏性瞬脱。在没有干扰物的情况下,第二目标检测性能以 theta 节律波动,但当干扰物散布在目标中时,波动频率向 alpha 节律移动。我们在脑磁图实验中进一步表明,持续神经振荡的主要频率的变化伴随着知觉表现的变化,顶叶θ在无干扰条件下更加明显,枕叶α在干扰条件下更加明显。我们认为,感知节律可能取决于正在进行的神经振荡之间的功率平衡,而这由特定任务的需求决定。
Brain oscillations in the theta (3–7 Hz) and alpha (7–13 Hz) bands are implicated in visual perception and attention. We show that in an attentional blink paradigm, where the task requires detecting two targets presented in rapid succession, perceptual performance varied with the rhythms at these two frequencies, which we name attentional rhythmic blink. In the absence of distractors, second target detection performance fluctuated at the theta rhythm, but the fluctuation frequency shifted toward alpha rhythm when distractors were interspersed with the targets. We further show, in magnetoencephalography experiments, that a change in the dominant frequency of ongoing neural oscillations accompanied those in perceptual performance, with the parietal theta being more pronounced in the no-distractor and the occipital alpha in the distractor conditions, respectively. We propose that perceptual rhythms may depend on the power balance between ongoing neural oscillations, determined by the task-specific demand.
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