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首页> 外文期刊>Neuron >Feature-based attention modulates orientation-selective responses in human visual cortex.
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Feature-based attention modulates orientation-selective responses in human visual cortex.

机译：基于特征的注意力调节人类视觉皮层中的方向选择性响应。

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摘要

How does feature-based attention modulate neural responses? We used adaptation to quantify the effect of feature-based attention on orientation-selective responses in human visual cortex. Observers were adapted to two superimposed oblique gratings while attending to one grating only. We measured the magnitude of attention-induced orientation-selective adaptation both psychophysically, by the behavioral tilt aftereffect, and physiologically, using fMRI response adaptation. We found evidence for orientation-selective attentional modulation of neuronal responses-a lower fMRI response for the attended than the unattended orientation-in multiple visual areas, and a significant correlation between the magnitude of the tilt aftereffect and that of fMRI response adaptation in V1, the earliest site of orientation coding. These results show that feature-based attention can selectively increase the response of neuronal subpopulations that prefer the attended feature, even when the attended and unattended featuresare coded in the same visual areas and share the same retinotopic location.
机译：基于特征的注意力如何调节神经反应？我们使用自适应来量化基于特征的注意力对人类视觉皮层中方向选择性响应的影响。观察者适用于两个叠加的倾斜光栅，而仅照看一个光栅。我们通过行为倾斜后效应从心理上测量注意力诱导的定向选择性适应的幅度，并使用fMRI反应适应在生理上测量。我们发现了在多个视觉区域中神经元反应的定向选择性注意调节的证据-有人参与的fMRI反应比无人看管的定向低-在多个视觉区域中，倾斜后效应的幅度与fMRI适应的幅度之间存在显着相关性，方向编码的最早位置。这些结果表明，基于特征的注意力可以选择性地增加喜欢有人看特征的神经元亚群的反应，即使有人和无人看管的特征在相同的视觉区域编码并且共享相同的视网膜位点位置也是如此。

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