Voluntary orienting is dissociated from target detection in human posterior parietal cortex
Voluntary orienting is dissociated from target detection in human posterior parietal cortex
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DOI：
10.1038/73009
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发表时间：
2000-03-01
影响因子：
25
通讯作者：
Shulman, GL
中科院分区：
文献类型：
--
作者：
Corbetta, M;Kincade, JM;Shulman, GL
人类根据空间位置来处理视觉刺激的能力需要顶叶皮层。有一种假说认为，顶叶皮层控制着注意力向感兴趣的位置的自主定向。另一个假说强调了它在将注意力重新定向到出现在无人值守位置的视觉目标方面的作用。在这里，使用事件相关功能磁共振（ER-fMRI），我们表明，不同的顶叶区域介导这些不同的注意过程。皮质激活主要发生在顶内沟时，一个位置出席视觉目标介绍之前，但在右颞顶交界处时，目标被检测到，特别是在一个无人值守的位置。
Human ability to attend to visual stimuli based on their spatial locations requires the parietal cortex. One hypothesis maintains that parietal cortex controls the voluntary orienting of attention toward a location of interest. Another hypothesis emphasizes its role in reorienting attention toward visual targets appearing at unattended locations. Here, using event-related functional magnetic resonance (ER-fMRI), we show that distinct parietal regions mediated these different attentional processes. Cortical activation occurred primarily in the intraparietal sulcus when a location was attended before visual-target presentation, but in the right temporoparietal junction when the target was detected, particularly at an unattended location.