Covert Tracking: A Combined ERP and Fixational Eye Movement Study
Covert Tracking: A Combined ERP and Fixational Eye Movement Study
复制标题
隐蔽追踪：ERP 和注视眼动相结合的研究
作者：
A. Makin;E. Poliakoff;R. Ackerley;W. el
可以将注意力指向特定的空间位置，或者关注在预期时间点出现的对象。虽然大多数工作都是孤立地关注空间或时间注意，但我们研究的是对平稳移动目标的隐蔽跟踪，这需要两者的持续协调。我们测试了两个关于这种操作的神经和认知基础的命题：第一，隐蔽跟踪是右脑的一种功能，第二，在跟踪过程中，眼球运动系统的运动前部件负责驱动隐蔽空间注意。我们同时记录了事件相关电位(ERPs)和眼位，受试者隐蔽地跟踪12°或20°向左或向右移动的点/S。ERPs对目标运动的方向很敏感。向左运动的地形发展是向右运动的镜像，这表明两个半球对隐蔽跟踪的贡献是相等的。根据目标运动的方向，眼睛位置的微小移动也被侧化，这意味着眼球运动系统的隐蔽激活。这些数据解决了关于视觉空间跟踪性质的两个悬而未决的问题。首先，隐蔽追踪依赖于对称的额顶叶注意系统，而不是右侧化。其次，这个系统同时控制着追踪者的眼球运动和秘密跟踪。
Attention can be directed to particular spatial locations, or to objects that appear at anticipated points in time. While most work has focused on spatial or temporal attention in isolation, we investigated covert tracking of smoothly moving objects, which requires continuous coordination of both. We tested two propositions about the neural and cognitive basis of this operation: first that covert tracking is a right hemisphere function, and second that pre-motor components of the oculomotor system are responsible for driving covert spatial attention during tracking. We simultaneously recorded event related potentials (ERPs) and eye position while participants covertly tracked dots that moved leftward or rightward at 12 or 20°/s. ERPs were sensitive to the direction of target motion. Topographic development in the leftward motion was a mirror image of the rightward motion, suggesting that both hemispheres contribute equally to covert tracking. Small shifts in eye position were also lateralized according to the direction of target motion, implying covert activation of the oculomotor system. The data addresses two outstanding questions about the nature of visuospatial tracking. First, covert tracking is reliant upon a symmetrical frontoparietal attentional system, rather than being right lateralized. Second, this same system controls both pursuit eye movements and covert tracking.
影响因子：
2.5
作者：
Culham, JC;Brandt, SA;Tootell, RBH
通讯作者：
Tootell, RBH
DOI：
10.1073/pnas.95.3.831
发表时间：
1998-02-03
影响因子：
11.1
作者：
Corbetta, M
通讯作者：
Corbetta, M