...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>NeuroImage >Heightened activity in a key region of the ventral attention network is linked to reduced activity in a key region of the dorsal attention network during unexpected shifts of covert visual spatial attention
【24h】

Heightened activity in a key region of the ventral attention network is linked to reduced activity in a key region of the dorsal attention network during unexpected shifts of covert visual spatial attention

机译：在隐性视觉空间注意的意外变化过程中，腹侧注意网络关键区域活动的增加与背侧注意网络关键区域活动的减少有关

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

To enable unexpected shifts of covert visual spatial attention, a ventral attention network is thought to dampen activity in a dorsal attention network that maintains the current focus of attention. However, direct evidence to support this view is scarce. In the present study, we investigated this hypothesis by asking healthy young adults to perform a covert visual spatial attention task while their brain activity was recorded with functional magnetic resonance imaging (fMRI). In each trial, participants discriminated the orientation of a target-colored letter in the cued visual field (valid trials) or, occasionally, in the uncued visual field (invalid trials). Consistent with prior work, the ventral attention network was more active in invalid trials than in valid trials. Most importantly, functional connectivity analyses revealed that an increase of activity in the right inferior frontal gyrus (a key region of the ventral attention network) was linked to smaller increases of activity in (a) the right inferior parietal lobe (a key region of the dorsal attention network) and (b) the left dorsolateral prefrontal cortex and dorsal anterior cingulate cortex (other regions enabling the control of attention) in invalid trials, relative to valid trials. These findings provide novel support for the view that key regions of the ventral attention network help to enable unexpected shifts of covert visual spatial attention by dampening activity in brain regions that participate in maintaining the current focus of attention.
机译：为了使隐蔽的视觉空间注意力发生意外变化，人们认为腹侧注意力网络会抑制背侧注意力网络中的活动，从而保持当前的注意力集中。但是，缺乏支持这种观点的直接证据。在本研究中，我们通过要求健康的年轻成年人执行秘密的视觉空间注意任务，同时使用功能性磁共振成像（fMRI）记录他们的大脑活动，从而研究了这一假设。在每个试验中，参与者在提示的视野中（有效的试验）或偶尔在无提示的视野中（无效的试验）区分目标色字母的方向。与先前的工作一致，无效试验中的腹侧注意网络比有效试验中的更为活跃。最重要的是，功能连通性分析显示，右侧下额回（腹侧注意网络的关键区域）的活动增加与（a）右侧下顶叶（腹侧的关键区域）活动的较小增加有关。相对于有效试验，在无效试验中，（b）左背外侧前额叶皮层和背扣带前皮层（其他可控制注意力的区域）。这些发现为以下观点提供了新颖的支持：腹侧注意力网络的关键区域通过抑制参与维持当前注意力焦点的大脑区域的活动，有助于实现秘密的视觉空间注意力的意外转移。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号