Neuron-specific contribution of the superior colliculus to overt and covert shifts of attention
Neuron-specific contribution of the superior colliculus to overt and covert shifts of attention
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DOI：
10.1038/nn1169
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发表时间：
2004-01-01
影响因子：
25
通讯作者：
Thier, P
中科院分区：
文献类型：
--
作者：
Ignashchenkova, A;Dicke, PW;Thier, P
对周边视觉位置的分析可以通过两种方式进行改进：一种是通过调整凝视方向（通常是通过注视扫视），另一种是在不做眼球运动的情况下“偷偷地”将注意力转移到周边位置。前运动注意理论认为，扫视和空间注意转移有一个共同的功能模块，具有不同的神经元基础。利用训练过的恒河猴大脑的单单元记录，我们研究了控制扫视的主要皮层下中心——上丘是否参与了控制注意力和扫视的共享网络。在这里，我们展示了上丘中间层的一种不同类型的神经元，即视觉运动神经元，它被认为主要参与扫视的准备，在隐蔽的注意力转移中也很活跃。
The analysis of a peripheral visual location can be improved in two ways: either by orienting one's gaze (usually by making a foveating saccade) or by 'covertly' shifting one's attention to the peripheral location without making an eye movement. The premotor theory of attention holds that saccades and spatial shifts of attention share a common functional module with a distinct neuronal basis. Using single-unit recording from the brains of trained rhesus monkeys, we investigated whether the superior colliculus, the major subcortical center for the control of saccades, is part of this shared network for attention and saccades. Here we show that a distinct type of neuron in the intermediate layer of the superior colliculus, the visuomotor neuron, which is known to be centrally involved in the preparation of saccades, is also active during covert shifts of attention.