事件相关电位中的N2pc成分与语言对颜色感知的偏侧化效应。
The N2pc component in ERP and the lateralization effect of language on color perception.
作者信息
Liu Qiang, Li Hong, Campos Jennifer L, Wang Qi, Zhang Ye, Qiu Jiang, Zhang Qinglin, Sun Hong-Jin
机构信息
Key Laboratory of Cognition and Personality, Ministry of Education, Southwest University, Chongqing 400715, China.
出版信息
Neurosci Lett. 2009 Apr 17;454(1):58-61. doi: 10.1016/j.neulet.2009.02.045. Epub 2009 Feb 26.
This study examined the electrophysiological bases of the effect of language on color perception. In a visual search task, a target was presented to the left or right visual field. The target color was either from the same category as a set of distractors (within-category condition) or from a different category (between-category condition). For both category conditions, the targets elicited a clear N2pc (N2-posterior-contralateral) component in the event-related potential (ERP) in the contralateral hemisphere. In the left hemisphere only, the N2pc amplitude for the between-category condition was larger than that for the within-category condition. These results indicate that the N2pc could be used as an index to describe the lateralization effect of language on color perception.
本研究考察了语言对颜色感知影响的电生理基础。在一项视觉搜索任务中，向左侧或右侧视野呈现一个目标。目标颜色要么与一组干扰物属于同一类别（类别内条件），要么属于不同类别（类别间条件）。对于这两种类别条件，目标在对侧半球的事件相关电位（ERP）中均引发了清晰的N2pc（N2-后部-对侧）成分。仅在左半球，类别间条件下的N2pc振幅大于类别内条件下的。这些结果表明，N2pc可作为描述语言对颜色感知的偏侧化效应的一个指标。
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