空间注意力与额顶叶阿尔法波段刺激的影响
Spatial Attention and the Effects of Frontoparietal Alpha Band Stimulation.
作者信息
van Schouwenburg Martine R, Zanto Theodore P, Gazzaley Adam
机构信息
Departments of Neurology, Physiology and Psychiatry, University of California, San FranciscoSan Francisco, CA, USA; Neuroscape, University of California, San FranciscoSan Francisco, CA, USA; Department of Psychology, University of AmsterdamAmsterdam, Netherlands.
Departments of Neurology, Physiology and Psychiatry, University of California, San FranciscoSan Francisco, CA, USA; Neuroscape, University of California, San FranciscoSan Francisco, CA, USA.
出版信息
Front Hum Neurosci. 2017 Jan 24;10:658. doi: 10.3389/fnhum.2016.00658. eCollection 2016.
A frontoparietal network has long been implicated in top-down control of attention. Recent studies have suggested that this network might communicate through coherence in the alpha band. Here we aimed to test the effect of coherent alpha (8-12 Hz) stimulation on the frontoparietal network. To this end, we recorded behavioral performance and electroencephalography (EEG) data while participants were engaged in a spatial attention task. Furthermore, participants received transcranial alternating current stimulation (tACS) over the right frontal and parietal cortex, which oscillated coherently in-phase within the alpha band. Compared to a group of participants that received sham stimulation, we found that coherent frontoparietal alpha band stimulation altered a behavioral spatial attention bias. Neurally, the groups showed hemispheric-specific differences in alpha coherence between the frontal and parietal-occipital cortex. These results provide preliminary evidence that alpha coherence in the frontoparietal network might play a role in top-down control of spatial attention.
额顶叶网络长期以来一直被认为与注意力的自上而下控制有关。最近的研究表明，该网络可能通过α波段的相干性进行通信。在此，我们旨在测试相干α（8 - 12赫兹）刺激对额顶叶网络的影响。为此，我们在参与者进行空间注意力任务时记录了行为表现和脑电图（EEG）数据。此外，参与者在右侧额叶和顶叶皮质接受经颅交流电刺激（tACS），该刺激在α波段内同相相干振荡。与接受假刺激的一组参与者相比，我们发现相干额顶叶α波段刺激改变了行为空间注意力偏差。在神经层面上，两组在额叶与顶叶 - 枕叶皮质之间的α相干性上表现出半球特异性差异。这些结果提供了初步证据，表明额顶叶网络中的α相干性可能在空间注意力的自上而下控制中发挥作用。
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