Sustained selective intermodal attention modulates processing of language-like stimuli
Sustained selective intermodal attention modulates processing of language-like stimuli
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DOI：
10.1007/s00221-011-2667-2
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发表时间：
2011-09-01
影响因子：
2
通讯作者：
Mueller, Matthias M.
中科院分区：
文献类型：
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作者：
Keitel, Christian;Schroeger, Erich;Mueller, Matthias M.
通道间注意（IA）被认为是分配有限的神经处理资源，从一个特定的感觉通道的输入。我们研究了持续IA对40 Hz听觉（ASSR）和4.3 Hz视觉稳态反应（VSSR）振幅的影响。为此，我们同时提出了调幅多语音牙牙学语和一个流的无意义的字母集，以引起各自的大脑反应。受试者trialwise提示有选择地参加几秒钟，他们必须执行偶尔出现的单词和假词的词汇决策任务的一个流。注意听觉流导致更大的ASSR振幅比注意视觉流。反之亦然，VSSR振幅更大时，视觉流出席。我们表明，IA研究通过频率标记可以扩展到复杂的刺激，在目前的研究中使用。此外，我们不仅表明，IA选择性地调制处理并发的多感觉输入，但这种调制过程中发生的IA的审判线索。频率标记的使用可能适合于研究IA在包含大量多感觉信号的更自然的设置中的作用。
Intermodal attention (IA) is assumed to allocate limited neural processing resources to input from one specific sensory modality. We investigated effects of sustained IA on the amplitude of a 40-Hz auditory (ASSR) and a 4.3-Hz visual steady-state response (VSSR). To this end, we concurrently presented amplitude-modulated multi-speech babble and a stream of nonsense letter sets to elicit the respective brain responses. Subjects were cued trialwise to selectively attend to one of the streams for several seconds where they had to perform a lexical decision task on occasionally occurring words and pseudowords. Attention to the auditory stream led to greater ASSR amplitudes than attention to the visual stream. Vice versa, the VSSR amplitude was greater when the visual stream was attended. We demonstrate that IA research by means of frequency tagging can be extended to complex stimuli as used in the current study. Furthermore, we show not only that IA selectively modulates processing of concurrent multisensory input but that this modulation occurs during trial-by-trial cueing of IA. The use of frequency tagging may be suitable to study the role of IA in more naturalistic setups that comprise a larger number of multisensory signals.