Robust selectivity to two-object images in human visual cortex.
Robust selectivity to two-object images in human visual cortex.
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DOI：
10.1016/j.cub.2010.03.050
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发表时间：
2010-05-11
期刊：
影响因子：
--
通讯作者：
Kreiman G
中科院分区：
文献类型：
--
作者：
Agam Y;Liu H;Papanastassiou A;Buia C;Golby AJ;Madsen JR;Kreiman G
我们可以在几分之一秒内识别物体，尽管存在其他物体。猕猴V4区和颞叶下皮层对神经元偏好刺激的反应通常会被感受野内添加的第二个物体所抑制。这种抑制如何与复杂场景中的快速视觉识别相协调？一种选择是，某些“特殊类别”不受其他对象的影响，但这使得其他类别的问题无法解决。另一种可能性是，连续的注意力转移有助于改善分心物体的问题。然而，心理物理学研究，头皮记录和神经生理学记录表明，最初的视觉处理包含了大量的信息。我们记录了人类视觉皮层在呈现双物体图像闪光时的颅内场电位。在最初的~200 ms期间，颞叶皮层的视觉选择性对其他物体的存在很大程度上是鲁棒的。我们可以训练线性解码器对孤立对象的响应，并解码双对象图像中的信息。这些观察结果与快速视觉识别的平行、分层和前馈理论相一致，并可能为开始解开自然场景中的快速识别提供神经基础。
We can recognize objects in a fraction of a second in spite of the presence of other objects. The responses in macaque areas V4 and inferior temporal cortex to a neuron’s preferred stimuli are typically suppressed by the addition of a second object within the receptive field (see however). How can this suppression be reconciled with rapid visual recognition in complex scenes? One option is that certain “special categories” are unaffected by other objects but this leaves the problem unsolved for other categories. Another possibility is that serial attentional shifts help ameliorate the problem of distractor objects. Yet, psychophysical studies, scalp recordings and neurophysiological recordings, suggest that the initial sweep of visual processing contains a significant amount of information. We recorded intracranial field potentials in human visual cortex during presentation of flashes of two-object images. Visual selectivity from temporal cortex during the initial ~200 ms was largely robust to the presence of other objects. We could train linear decoders on the responses to isolated objects and decode information in two-object images. These observations are compatible with parallel, hierarchical and feed-forward theories of rapid visual recognition and may provide a neural substrate to begin to unravel rapid recognition in natural scenes.
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影响因子：
2.5
作者：
Gawne, TJ;Martin, JM
通讯作者：
Martin, JM
影响因子：
9.2
作者：
Reddy, Leila;Quiroga, Rodrigo Quian;Fried, Itzhak
通讯作者：
Fried, Itzhak
影响因子：
2.9
作者：
MILLER, EK;GOCHIN, PM;GROSS, CG
通讯作者：
GROSS, CG
影响因子：
3.7
作者：
McCarthy, G;Puce, A;Allison, T
通讯作者：
Allison, T
DOI：
10.1073/pnas.0907330106
发表时间：
2009-12-15
影响因子：
11.1
作者：
Reddy, Leila;Kanwisher, Nancy G.;VanRullen, Rufin
通讯作者：
VanRullen, Rufin