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同时呈现听觉和视觉刺激时跨通道持续选择性注意的神经机制。

Neural mechanisms of intermodal sustained selective attention with concurrently presented auditory and visual stimuli.

作者信息

Saupe Katja, Schröger Erich, Andersen Søren K, Müller Matthias M

机构信息

Institute of Psychology I, University of Leipzig Leipzig, Germany.

出版信息

Front Hum Neurosci. 2009 Nov 30;3:58. doi: 10.3389/neuro.09.058.2009. eCollection 2009.

DOI:10.3389/neuro.09.058.2009
PMID:20011221
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC2791035/
Abstract

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.

摘要

我们研究了跨通道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,同时呈现40赫兹调幅音和闪烁(7.5赫兹)随机字母流。通过听觉或视觉目标检测任务,参与者的注意力被引导至相应通道数秒。与关注视觉流时相比,关注听觉流导致ASSR显著增强。这种注意力调制主要位于右侧颞上回。反之,关注视觉流尤其增加了SSVEP的二次谐波反应。这种调制集中在双侧半球的枕下回和枕颞外侧回。据我们所知,这是首次证明跨通道持续注意对ASSR和SSVEP的幅度调制。我们的研究结果为理解人类大脑中跨通道注意的基本神经机制开辟了一条新的研究途径。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/69eb/2791035/2acce20596fb/fnhum-03-058-g008.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/69eb/2791035/13c41244bac9/fnhum-03-058-g005.jpg
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https://cdn.ncbi.nlm.nih.gov/pmc/blobs/69eb/2791035/2acce20596fb/fnhum-03-058-g008.jpg

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