Auditory selective attention reveals preparatory activity in different cortical regions for selection based on source location and source pitch.
Auditory selective attention reveals preparatory activity in different cortical regions for selection based on source location and source pitch.
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DOI：
10.3389/fnins.2012.00190
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发表时间：
2012
影响因子：
4.3
通讯作者：
Shinn-Cunningham BG
中科院分区：
文献类型：
--
作者：
Lee AK;Rajaram S;Xia J;Bharadwaj H;Larson E;Hämäläinen MS;Shinn-Cunningham BG
为了在丰富的环境中提取信息，我们专注于不同的功能，使我们能够将注意力集中到感兴趣的任何来源。在空间注意，特别是在视觉中，皮质网络部署，是很好的特点。例如，视觉空间注意力涉及包括额叶眼场（FEF）的额顶网络，其调节视觉感觉区域中的活动以增强对所关注的视觉对象的表示。然而，关于控制非空间特征或听觉对象或特征（空间或非空间）的注意力的神经回路，我们知之甚少。在这里，使用组合脑磁图（MEG）和从MRI获得的解剖信息，我们对比皮质活动时，观察者出席了不同的听觉功能给予相同的声学混合的两个同时发言的数字。利用MEG的精细时间分辨率，我们建立了左FEF的活动增强之前和整个听觉刺激时，听众直接听觉注意目标位置相比，当他们专注于目标音高。相反，活动在左后上级颞沟（STS），以前与听觉音高分类，是更大的听众直接注意目标音高，而不是目标位置。这种差异性增强只有在观察者被指示注意哪一个线索之后，但在声学刺激开始之前才是显著的。因此，我们认为，左FEF更强烈地参与指导听觉空间注意，而左STS援助听觉对象选择的基础上的非空间声学特征的音高。
In order to extract information in a rich environment, we focus on different features that allow us to direct attention to whatever source is of interest. The cortical network deployed during spatial attention, especially in vision, is well characterized. For example, visuospatial attention engages a frontoparietal network including the frontal eye fields (FEFs), which modulate activity in visual sensory areas to enhance the representation of an attended visual object. However, relatively little is known about the neural circuitry controlling attention directed to non-spatial features, or to auditory objects or features (either spatial or non-spatial). Here, using combined magnetoencephalography (MEG) and anatomical information obtained from MRI, we contrasted cortical activity when observers attended to different auditory features given the same acoustic mixture of two simultaneous spoken digits. Leveraging the fine temporal resolution of MEG, we establish that activity in left FEF is enhanced both prior to and throughout the auditory stimulus when listeners direct auditory attention to target location compared to when they focus on target pitch. In contrast, activity in the left posterior superior temporal sulcus (STS), a region previously associated with auditory pitch categorization, is greater when listeners direct attention to target pitch rather than target location. This differential enhancement is only significant after observers are instructed which cue to attend, but before the acoustic stimuli begin. We therefore argue that left FEF participates more strongly in directing auditory spatial attention, while the left STS aids auditory object selection based on the non-spatial acoustic feature of pitch.
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影响因子：
2.9
作者：
Gherri, Elena;Driver, Jon;Eimer, Martin
通讯作者：
Eimer, Martin
DOI：
10.1093/cercor/bhq045
发表时间：
2010-12
期刊：
Cerebral cortex (New York, N.Y. : 1991)
影响因子：
--
作者：
Liebenthal E;Desai R;Ellingson MM;Ramachandran B;Desai A;Binder JR
通讯作者：
Binder JR
影响因子：
5.7
作者：
Fischl, B;Sereno, MI;Dale, AM
通讯作者：
Dale, AM
绝对感知音高：比较音高内存任务中的绝对和相对音高的拥有者。
影响因子：
2.4
作者：
Schulze K;Gaab N;Schlaug G
通讯作者：
Schlaug G
影响因子：
5.7
作者：
Mayer, AR;Harrington, D;Lee, R
通讯作者：
Lee, R