Attentional selection of location and modality in vision and touch modulates low-frequency activity in associated sensory cortices.
Attentional selection of location and modality in vision and touch modulates low-frequency activity in associated sensory cortices.
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DOI：
10.1152/jn.00973.2011
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发表时间：
2012-05
影响因子：
2.5
通讯作者：
Driver J
中科院分区：
文献类型：
--
作者：
Bauer M;Kennett S;Driver J
选择性注意使我们能够专注于特定的感官形式和位置。关于对感觉模态的注意力如何与其他特征的选择（如空间位置）有关，相对而言知之甚少，尽管有人提出低频调制（α和β波段）可能是关键。在这里，我们研究了如何注意空间（左或右）和注意方式（视觉或触觉）影响人类感觉皮层的持续低频振荡脑活动。当参与者执行视觉或触觉任务时，记录脑磁图。在不同的区块中，触摸或视觉是任务相关的，而空间注意力在每次试验中都被提示到左边或右边。专注于一种或另一种模态会抑制相应感觉皮层上的α振荡。当空间注意与任务相关时，在线索-目标间隔中，注意位置对侧的感觉运动和枕叶皮层的α振荡都减少了。即使是模态选择传感器也表现出空间注意力的影响，这两种方式。视觉和感觉运动的结果通常是高度收敛的，然而，尽管枕叶皮层的注意力效应在α带中占主导地位，但在感觉运动皮层中，这些效应也明显存在于β带中。这些结果扩展了以前的研究结果，空间注意力可以在多模态的方式，并表明注意空间和模态都依赖于类似的机制，调制低频振荡。
Selective attention allows us to focus on particular sensory modalities and locations. Relatively little is known about how attention to a sensory modality may relate to selection of other features, such as spatial location, in terms of brain oscillations, although it has been proposed that low-frequency modulation (α- and β-bands) may be key. Here, we investigated how attention to space (left or right) and attention to modality (vision or touch) affect ongoing low-frequency oscillatory brain activity over human sensory cortex. Magnetoencephalography was recorded while participants performed a visual or tactile task. In different blocks, touch or vision was task-relevant, whereas spatial attention was cued to the left or right on each trial. Attending to one or other modality suppressed α-oscillations over the corresponding sensory cortex. Spatial attention led to reduced α-oscillations over both sensorimotor and occipital cortex contralateral to the attended location in the cue-target interval, when either modality was task-relevant. Even modality-selective sensors also showed spatial-attention effects for both modalities. The visual and sensorimotor results were generally highly convergent, yet, although attention effects in occipital cortex were dominant in the α-band, in sensorimotor cortex, these were also clearly present in the β-band. These results extend previous findings that spatial attention can operate in a multimodal fashion and indicate that attention to space and modality both rely on similar mechanisms that modulate low-frequency oscillations.
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影响因子：
3.2
作者：
Kennett, S;Eimer, M;Driver, J
通讯作者：
Driver, J
DOI：
10.1073/pnas.0907658106
发表时间：
2010-01-05
影响因子：
11.1
作者：
Buffalo, Elizabeth A.;Fries, Pascal;Desimone, Robert
通讯作者：
Desimone, Robert
影响因子：
4.7
作者：
Bastiaansen, MCM;Knösche, TR
通讯作者：
Knösche, TR
影响因子：
3.7
作者：
Felleman, Daniel J.;Van Essen, David C.
通讯作者：
Van Essen, David C.
DOI：
10.1515/bmte.2002.47.3.59
发表时间：
2002-03-01
期刊：
BIOMEDIZINISCHE TECHNIK
影响因子：
--
作者：
Knösche, TR
通讯作者：
Knösche, TR