Neural mechanisms of intermodal sustained selective attention with concurrently presented auditory and visual stimuli
Neural mechanisms of intermodal sustained selective attention with concurrently presented auditory and visual stimuli
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DOI：
10.3389/neuro.09.058.2009
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发表时间：
2009-11-01
影响因子：
2.9
通讯作者：
Mueller, Matthias M.
中科院分区：
文献类型：
--
作者：
Saupe, Katja;Schroeger, Erich;Mueller, Matthias M.
研究了通道间注意对听觉稳态反应（ASSR）和稳态视觉诱发电位（SSVEP）的影响。为此，40赫兹调幅音调和闪烁（7.5赫兹）随机字母流同时出现。通过听觉或视觉目标检测任务，参与者的注意力被引导到相应的模态几秒钟。注意听觉流导致ASSR的显着增强相比，当视觉流出席。这种注意调节主要位于右侧上级颞回。反之亦然，特别是注意视觉流增加了SSVEP的二次谐波响应。这种调制集中在两个半球的枕下回和枕颞外侧回。据我们所知，这是第一次演示的振幅调制的ASSR和SSVEP的联运持续注意。我们的研究结果开辟了一条新的研究途径，以了解人类大脑中的通道间注意的基本神经机制。
We investigated intermodal attention effects on the auditory steady-state response (ASSR) and the steady-state visual evoked potential (SSVEP). For this purpose, 40-Hz amplitude-modulated tones and a stream of flickering (7.5 Hz) random letters were presented concurrently. By means of an auditory or visual target detection task, participants' attention was directed to the respective modality for several seconds. Attention to the auditory stream led to a significant enhancement of the ASSR compared to when the visual stream was attended. This attentional modulation was located mainly in the right superior temporal gyrus. Vice versa, attention to the visual stream especially increased the second harmonic response of the SSVEP. This modulation was focused in the inferior occipital and lateral occipitotemporal gyrus of both hemispheres. To the best of our knowledge, this is the first demonstration of amplitude modulation of the ASSR and the SSVEP by intermodal sustained attention. Our results open a new avenue of research to understand the basic neural mechanisms of intermodal attention in the human brain.