ATTENTIONAL MODULATION OF NEURAL PROCESSING OF SHAPE, COLOR, AND VELOCITY IN HUMANS
ATTENTIONAL MODULATION OF NEURAL PROCESSING OF SHAPE, COLOR, AND VELOCITY IN HUMANS
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DOI：
10.1126/science.2360050
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发表时间：
1990-06-22
期刊：
影响因子：
56.9
通讯作者：
PETERSEN, SE
中科院分区：
文献类型：
--
作者：
CORBETTA, M;MIEZIN, FM;PETERSEN, SE
正电子发射断层扫描（PET）被用来测量正常受试者的局部脑血流量的变化，而他们正在区分同一组视觉刺激的不同属性（形状，颜色和速度）。心理物理学证据表明，当被试将注意力集中在一个属性上时，辨别细微刺激变化的灵敏度高于将注意力分散在多个属性上时的灵敏度。相应地，注意力增强了纹外视皮层不同区域的活动，这些区域似乎专门处理与所选属性相关的信息。
Positron emission tomography (PET) was used to measure changes in regional cerebral blood flow of normal subjects, while they were discriminating different attributes (shape, color, and velocity) of the same set of visual stimuli. Psychophysical evidence indicated that the sensitivity for discriminating subtle stimulus changes was higher when subjects focused attention on one attribute then when they divided attention among several attributes. Correspondingly, attention enhanced the activity of different regions of extrastriate visual cortex that appear to be specialized for processing information related to the selected attribute.