A physiological correlate of the 'spotlight' of visual attention
A physiological correlate of the 'spotlight' of visual attention
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DOI：
10.1038/7280
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发表时间：
1999-04-01
影响因子：
25
通讯作者：
DeYoe, EA
中科院分区：
文献类型：
--
作者：
Brefczynski, JA;DeYoe, EA
在这里，我们确定了一种神经相关能力，即准确地将视觉注意力引导到凝视中心以外的位置。在一系列密集的靶子和干扰物中，人类受试者需要将视觉注意力(但不是凝视)从一个位置转移到下一个位置，而功能磁共振被用来绘制视觉皮质内神经激活的相应位移。当单独呈现时，纯注意力驱动活动的皮质地形图与提示目标所引起的活动地形图精确匹配。这种注意相关激活的视网膜定位图出现在初级视觉皮质，以及先前涉及加工注意目标特征的背内侧和枕叶腹侧视区。这些结果确定了空间定向视觉注意效应的生理学基础。
Here we identify a neural correlate of the ability to precisely direct visual attention to locations other than the center of gaze. Human subjects performed a task requiring shifts of visual attention (but not of gaze) from one location to the next within a dense array of targets and distracters while functional MRI was used to map corresponding displacements of neural activation within visual cortex. The cortical topography of the purely attention-driven activity precisely matched the topography of activity evoked by the cued targets when presented in isolation. Such retinotopic mapping of attention-related activation was found in primary visual cortex, as well as in dorsomedial and ventral occipital visual areas previously implicated in processing the attended target features. These results identify a physiological basis for the effects of spatially directed visual attention.