Selective tuning of the left and right auditory cortices during spatially directed attention
Selective tuning of the left and right auditory cortices during spatially directed attention
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DOI：
10.1016/s0926-6410(98)00036-6
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发表时间：
1999-01-01
期刊：
影响因子：
--
通讯作者：
Näätänen, R
中科院分区：
文献类型：
--
作者：
Alho, K;Medvedev, SV;Näätänen, R
利用正电子发射断层扫描（PET）测量了空间定向听觉注意对人脑活动的影响，如局部脑血流量（rCBF）的变化所示。受试者出席了左耳音调，右耳音调，或中央凹视觉刺激呈现在三个并发刺激序列的快速速率。结果发现，选择性地注意右耳输入主要激活了左半球的听觉皮层，反之亦然。这种根据注意力方向对左右听觉皮层的选择性调节可能是由额叶皮层的执行注意机制控制的，在听觉注意过程中也观察到了增强的激活。(C)1999 Elsevier Science B.V.保留所有权利。
Effects of spatially directed auditory attention on human brain activity, as indicated by changes in regional cerebral blood flow (rCBF), were measured with positron emission tomography (PET). Subjects attended to left-ear tones, right-ear tones, or foveal visual stimuli presented at rapid rates in three concurrent stimulus sequences. It was found that attending selectively to the right-ear input activated the auditory cortex predominantly in the left hemisphere and vice versa. This selective tuning of the left and right auditory cortices according to the direction of attention was presumably controlled by executive attention mechanisms of the frontal cortex, where enhanced activation during auditory attention was also observed. (C) 1999 Elsevier Science B.V. All rights reserved.