Individual differences in attentional modulation of cortical responses correlate with selective attention performance.
Individual differences in attentional modulation of cortical responses correlate with selective attention performance.
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DOI：
10.1016/j.heares.2014.04.008
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发表时间：
2014-08
期刊：
影响因子：
2.8
通讯作者：
Shinn-Cunningham, Barbara
中科院分区：
文献类型：
--
作者：
Choi, Inyong;Wang, Le;Bharadwaj, Hari;Shinn-Cunningham, Barbara
许多研究表明，注意调节听觉场景的皮层表征，强调被注意的来源，同时抑制竞争来源。然而，这种注意调节的强度的个体差异及其与选择性注意能力的关系知之甚少。在这里，我们要问的是，注意力调节皮层反应的强度差异是否反映了听力正常者选择性听觉注意力能力的差异。我们要求听众注意三种相互竞争的旋律中的一种，并识别其音高轮廓，同时我们测量大脑皮层的脑电图反应。这三个旋律要么来自广泛分离的音高范围（“容易的试验”），要么来自狭窄的重叠音高范围（“困难的试验”）。旋律开始的时间略有不同;听众要么听主导旋律，要么听滞后旋律。由于开始的时间，主导旋律引起了外界的注意。相比之下，聆听滞后的旋律需要听众自愿地引导自上而下的注意力。我们量化了注意力如何放大听觉N1对旋律的反应，并发现N1放大存在很大的个体差异，即使只有正确回答的试验被用来量化ERP增益。重要的是，在简单的试验中，对滞后旋律的N1反应放大最强的听众在其他类型的试验中表现最好。我们的研究结果提出了这样一种可能性，即自上而下增益控制强度的个体差异反映了自上而下注意力控制能力的内在差异。
Many studies have shown that attention modulates the cortical representation of an auditory scene, emphasizing an attended source while suppressing competing sources. Yet, individual differences in the strength of this attentional modulation and their relationship with selective attention ability are poorly understood. Here, we ask whether differences in how strongly attention modulates cortical responses reflect differences in normal-hearing listeners’ selective auditory attention ability. We asked listeners to attend to one of three competing melodies and identify its pitch contour while we measured cortical electroencephalographic responses. The three melodies were either from widely separated pitch ranges (“easy trials”), or from a narrow, overlapping pitch range (“hard trials”). The melodies started at slightly different times; listeners attended either the leading or lagging melody. Because of the timing of the onsets, the leading melody drew attention exogenously. In contrast, attending the lagging melody required listeners to direct top-down attention volitionally. We quantified how attention amplified auditory N1 response to the attended melody and found large individual differences in the N1 amplification, even though only correctly answered trials were used to quantify the ERP gain. Importantly, listeners with the strongest amplification of N1 response to the lagging melody in the easy trials were the best performers across other types of trials. Our results raise the possibility that individual differences in the strength of top-down gain control reflect inherent differences in the ability to control top-down attention.
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DOI：
10.1016/0013-4694(74)90156-4
发表时间：
1974-01-01
期刊：
ELECTROENCEPHALOGRAPHY AND CLINICAL NEUROPHYSIOLOGY
影响因子：
--
作者：
PICTON, TW;HILLYARD, SA
通讯作者：
HILLYARD, SA
影响因子：
3.7
作者：
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通讯作者：
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DOI：
10.1111/j.2517-6161.1995.tb02031.x
发表时间：
1995-01-01
影响因子：
5.8
作者：
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通讯作者：
HOCHBERG, Y
DOI：
10.1073/pnas.0803718105
发表时间：
2008-09-02
影响因子：
11.1
作者：
Best, Virginia;Ozmeral, Erol J.;Shinn-Cunningham, Barbara G.
通讯作者：
Shinn-Cunningham, Barbara G.
DOI：
10.1098/rstb.1998.0281
发表时间：
1998-08-29
期刊：
PHILOSOPHICAL TRANSACTIONS OF THE ROYAL SOCIETY OF LONDON SERIES B-BIOLOGICAL SCIENCES
影响因子：
--
作者：
Hillyard, SA;Vogel, EK;Luck, SJ
通讯作者：
Luck, SJ