人类额叶眼区中视觉选择与扫视的分离。
Segregation of visual selection and saccades in human frontal eye fields.
作者信息
Juan C-H, Muggleton N G, Tzeng O J L, Hung D L, Cowey A, Walsh V
机构信息
Institute of Cognitive Neuroscience, National Central University, Jhongli 320, Taiwan.
出版信息
Cereb Cortex. 2008 Oct;18(10):2410-5. doi: 10.1093/cercor/bhn001. Epub 2008 Mar 6.
Abstract
The premotor theory of attention suggests that target processing and generation of a saccade to the target are interdependent. Temporally precise transcranial magnetic stimulation (TMS) was delivered over the human frontal eye fields, the area most frequently associated with the premotor theory in association with eye movements, while subjects performed a visually instructed pro-/antisaccade task. Visual analysis and saccade preparation were clearly separated in time, as indicated by 2 distinct time points of TMS delivery that resulted in elevated saccade latencies. These results show that visual analysis and saccade preparation, although frequently enacted together, are dissociable processes.
摘要
注意力的运动前理论表明，目标处理和向目标的扫视生成是相互依存的。在人类额眼区施加时间精确的经颅磁刺激（TMS），该区域在眼球运动方面最常与运动前理论相关联，同时让受试者执行视觉指示的正/反扫视任务。视觉分析和扫视准备在时间上明显分开，这由导致扫视潜伏期延长的两个不同TMS施加时间点表明。这些结果表明，视觉分析和扫视准备虽然经常一起发生，但却是可分离的过程。
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