The influence of visuospatial attention on unattended auditory 40 Hz responses.
The influence of visuospatial attention on unattended auditory 40 Hz responses.
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DOI：
10.3389/fnhum.2013.00370
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发表时间：
2013
影响因子：
2.9
通讯作者：
Bridwell DA
中科院分区：
文献类型：
--
作者：
Roth C;Gupta CN;Plis SM;Damaraju E;Khullar S;Calhoun VD;Bridwell DA
在健康的认知和感知中，必须整合来自多个大脑区域的信息。本研究考察了一种感觉通道内的皮质反应在多大程度上受到另一种感觉通道内执行的复杂任务的调节。研究人员测量了受试者对40赫兹听觉刺激的脑电反应，同时对40赫兹刺激的幅度进行了调制，并将其作为流行电脑游戏《俄罗斯方块》难度的函数。通过对脑电的傅立叶分析，分离出对40赫兹刺激的稳态响应。刺激频率的响应被周围频率内的响应归一化，产生信噪比(SNR)。从困难的视觉空间任务到简单的视觉空间任务，再到注意听觉刺激，八个个体中有七个人表现出40赫兹反应的对数信噪比单调增加。这一模式在统计上由单因素方差表示，表明三个任务之间的对数信噪比存在显著差异。对数信噪比与俄罗斯方块任务的难度(即速度)之间的显著相关性进一步证明了40赫兹听觉反应对视觉空间负荷的敏感性。因此，结果表明，40赫兹听觉皮层反应受个体对刺激的目标定向注意以及复杂视觉空间任务的困难程度的影响。
Information must integrate from multiple brain areas in healthy cognition and perception. The present study examined the extent to which cortical responses within one sensory modality are modulated by a complex task conducted within another sensory modality. Electroencephalographic (EEG) responses were measured to a 40 Hz auditory stimulus while individuals attended to modulations in the amplitude of the 40 Hz stimulus, and as a function of the difficulty of the popular computer game Tetris. The steady-state response to the 40 Hz stimulus was isolated by Fourier analysis of the EEG. The response at the stimulus frequency was normalized by the response within the surrounding frequencies, generating the signal-to-noise ratio (SNR). Seven out of eight individuals demonstrate a monotonic increase in the log SNR of the 40 Hz responses going from the difficult visuospatial task to the easy visuospatial task to attending to the auditory stimuli. This pattern is represented statistically by a One-Way ANOVA, indicating significant differences in log SNR across the three tasks. The sensitivity of 40 Hz auditory responses to the visuospatial load was further demonstrated by a significant correlation between log SNR and the difficulty (i.e., speed) of the Tetris task. Thus, the results demonstrate that 40 Hz auditory cortical responses are influenced by an individual's goal-directed attention to the stimulus, and by the degree of difficulty of a complex visuospatial task.
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影响因子：
25
作者：
Saenz, M;Buracas, GT;Boynton, GM
通讯作者：
Boynton, GM
影响因子：
2.4
作者：
Sims, VK;Mayer, RE
通讯作者：
Mayer, RE
影响因子：
2
作者：
Keitel, Christian;Schroeger, Erich;Mueller, Matthias M.
通讯作者：
Mueller, Matthias M.
影响因子：
3.2
作者：
Parks, Nathan A.;Hilimire, Matthew R.;Corballis, Paul M.
通讯作者：
Corballis, Paul M.
影响因子：
2.9
作者：
Saupe, Katja;Schroeger, Erich;Mueller, Matthias M.
通讯作者：
Mueller, Matthias M.