Attention during natural vision warps semantic representation across the human brain.
Attention during natural vision warps semantic representation across the human brain.
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DOI：
10.1038/nn.3381
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发表时间：
2013-06
影响因子：
25
通讯作者：
Gallant, Jack L.
中科院分区：
文献类型：
--
作者：
Cukur, Tolga;Nishimoto, Shinji;Huth, Alexander G.;Gallant, Jack L.
关于注意力如何改变人类感觉信息的皮层表征，我们知之甚少。基于神经生理学的证据，我们假设，注意引起调谐的变化，以扩大在无人看管的刺激为代价的代表出席刺激。为了研究这个问题，我们使用功能性磁共振成像（fMRI）来测量在自然电影中搜索不同对象类别时语义表征的变化。我们发现，许多体素跨枕颞叶和额顶叶皮层转向他们的调谐向出席类别。这些调整的变化扩大了表示的出席类别和语义相关，但无人看管的类别，并压缩表示的类别语义不同的目标。即使在电影中不存在所关注的类别时，也会发生语义表示的注意扭曲，因此该效果不是目标检测伪影。这些结果表明，注意力动态地改变视觉表征，以优化自然视觉过程中行为相关对象的处理。
Little is known about how attention changes the cortical representation of sensory information in humans. Based on neurophysiological evidence, we hypothesized that attention causes tuning changes to expand the representation of attended stimuli at the cost of unattended stimuli. To investigate this issue we used functional MRI (fMRI) to measure how semantic representation changes when searching for different object categories in natural movies. We find that many voxels across occipito-temporal and fronto-parietal cortex shift their tuning toward the attended category. These tuning shifts expand the representation of the attended category and of semantically-related but unattended categories, and compress the representation of categories semantically-dissimilar to the target. Attentional warping of semantic representation occurs even when the attended category is not present in the movie, thus the effect is not a target-detection artifact. These results suggest that attention dynamically alters visual representation to optimize processing of behaviorally relevant objects during natural vision.
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影响因子：
9.2
作者：
Nishimoto, Shinji;Vu, An T.;Naselaris, Thomas;Benjamini, Yuval;Yu, Bin;Gallant, Jack L.
通讯作者：
Gallant, Jack L.
影响因子：
64.8
作者：
Peelen, Marius V.;Fei-Fei, Li;Kastner, Sabine
通讯作者：
Kastner, Sabine
影响因子：
56.9
作者：
Hasson, U;Nir, Y;Malach, R
通讯作者：
Malach, R
影响因子：
16.2
作者：
Mazer, JA;Gallant, JL
通讯作者：
Gallant, JL
DOI：
10.1073/pnas.092277599
发表时间：
2002-07-09
影响因子：
11.1
作者：
Li, FF;VanRullen, R;Perona, P
通讯作者：
Perona, P