Superior colliculus and visual spatial attention.

Superior colliculus and visual spatial attention.
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DOI:
10.1146/annurev-neuro-062012-170249
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发表时间:
2013-07-08
影响因子:
13.9
通讯作者:
Zénon A
Zénon A
中科院分区:
医学1区
文献类型:
--
作者:
Krauzlis RJ;Lovejoy LP;Zénon A

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上级丘(SC)一直被认为是参与空间注意的大脑区域网络的一部分,但最近的研究结果大大改善了我们对其功能作用的理解。SC既执行注意的运动结果,又在运动前的目标选择过程中起着至关重要的作用。此外,即使在没有明显的定向运动,SC活动与转移的内隐注意,是必要的空间注意的知觉判断过程中的正常控制。将SC与空间注意力联系起来的神经元回路可能包括大脑皮层的注意力相关区域,但最近的研究结果表明,SC的贡献涉及独立于视觉皮层中已建立的注意力特征的机制。这些发现提出了新的问题,并提出了理解空间注意力的大脑机制的新可能性。
The superior colliculus (SC) has long been known to be part of the network of brain areas involved in spatial attention, but recent findings have dramatically refined our understanding of its functional role. The SC both implements the motor consequences of attention and plays a crucial role in the process of target selection that precedes movement. Moreover, even in the absence of overt orienting movements, SC activity is related to shifts of covert attention and is necessary for the normal control of spatial attention during perceptual judgments. The neuronal circuits that link the SC to spatial attention may include attention-related areas of the cerebral cortex, but recent results show that the SC's contribution involves mechanisms that operate independently of the established signatures of attention in visual cortex. These findings raise new issues and suggest novel possibilities for understanding the brain mechanisms that enable spatial attention.
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