Electrophysiological evidence of enhanced cortical activity in the human brain during visual curve tracing
Electrophysiological evidence of enhanced cortical activity in the human brain during visual curve tracing
复制标题
视觉曲线追踪过程中人脑皮质活动增强的电生理证据
DOI：
10.1016/j.visres.2009.12.006
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发表时间：
2010
期刊：
影响因子：
1.8
通讯作者：
Roberto Dell'Acqua
中科院分区：
文献类型：
--
作者：
C. Lefebvre;P. Jolicœur;Roberto Dell'Acqua
当参与者进行曲线追踪任务时，记录ERP，在该任务中，他们必须在其他三条分心物曲线中识别目标曲线的终点。与靶曲线一侧相关的差异激活以持续后对侧负波（SPCN）的形式存在。这种对侧大脑活动表明，在执行追踪任务期间，内隐注意力被部署到目标曲线上。SPCN的幅度根据假设的曲线追踪过程而变化，这取决于目标曲线的起始和结束位置是否高于水平中线或低于水平中线，并且对结果的详细分析提供了支持曲线追踪的注意力分散模型的证据。这些结果代表了反映人类视觉曲线追踪的脑活动的第一次神经生理学调查。
ERPs were recorded while participants performed a curve tracing task in which they had to identify the end point of a target curve presented among three other distractor curves. Differential activation associated with the side of the target curve was found in the form of a sustained posterior contralateral negativity (SPCN). This contralateral brain activity suggests covert attention was deployed to the target curve during performance of the tracing task. The amplitude of the SPCN varied according to the hypothesized curve-tracing process, depending on whether the start and end locations of the target curve were above to below the horizontal midline, or the opposite, and this detailed analysis of the results provided evidence supporting the spread-of-attention model of curve tracing. These results represent the first neurophysiological investigation of brain activity reflecting visual curve tracing in humans.