Hillyard S A, Anllo-Vento L
Department of Neurosciences, 0608, University of California at San Diego, La Jolla, CA 92093-0608, USA.
Proc Natl Acad Sci U S A. 1998 Feb 3;95(3):781-7. doi: 10.1073/pnas.95.3.781.
Event-related brain potentials (ERPs) provide high-resolution measures of the time course of neuronal activity patterns associated with perceptual and cognitive processes. New techniques for ERP source analysis and comparisons with data from blood-flow neuroimaging studies enable improved localization of cortical activity during visual selective attention. ERP modulations during spatial attention point toward a mechanism of gain control over information flow in extrastriate visual cortical pathways, starting about 80 ms after stimulus onset. Paying attention to nonspatial features such as color, motion, or shape is manifested by qualitatively different ERP patterns in multiple cortical areas that begin with latencies of 100-150 ms. The processing of nonspatial features seems to be contingent upon the prior selection of location, consistent with early selection theories of attention and with the hypothesis that spatial attention is "special."
事件相关脑电位(ERPs)提供了与感知和认知过程相关的神经元活动模式时间进程的高分辨率测量。ERP源分析的新技术以及与血流神经成像研究数据的比较,使得在视觉选择性注意期间皮质活动的定位得到改善。空间注意期间的ERP调制表明,在刺激开始后约80毫秒开始,在纹外视觉皮质通路中存在对信息流的增益控制机制。对颜色、运动或形状等非空间特征的注意,在多个皮质区域表现为定性不同的ERP模式,其起始潜伏期为100 - 150毫秒。非空间特征的处理似乎取决于位置的先前选择,这与注意的早期选择理论以及空间注意是“特殊的”这一假设一致。