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Is a color processed with a right hemispheric dominance?

颜色是由右半球优势处理的吗？

基本信息

批准号：
15500136
负责人：
SASAKI Hitoshi
金额：
$ 2.43万
依托单位：
Osaka University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2003
资助国家：
日本
起止时间：
2003 至 2004
项目状态：
已结题

项目摘要

It has been known that the left hemisphere is dominant in verbal and analystic processing, while the right hemisphere is dominant in emotional and holistic processing. The hemispheric difference in color signal processing is not well documented. We have been studied this matter using a reaction time task with a visual stimuli presented either in the right or the left visual field, and with a response by the ipsilateral hand. We found that significant hemispheric asymmetry with the right dominance in the color processing. No such asymmetry was obtained when we tested using achromatic stimuli, or when we presented color stimuli at the center of the visual field. These results strongly suggested that color processing was differentially processed in the both hemisphere with the right hemisphere dominance. The present study explored further the hemisphere dominance in color processing by investigating the asymmetry in color discrimination. Because discrimination processing based on analystic processing, it may lead to the left hemispheric dominance. On the other hand, the color discrimination might be processed with the right hemispheric dominance, as in the case of color detection, which we obtained previously. We investigated this matter in two tasks, one with language cues for the color discrimination and the other without language cues. In both case the discrimination task resulted in the left hemispheric dominance, showing that the color processing has hemispheric asymmetry ; the color detection is processed more rapidly in the right hemisphere while the color discrimination is processed with a left hemispheric dominance.

人们已经知道，左半球在言语和分析加工中占主导地位，而右半球在情感和整体加工中占主导地位。颜色信号处理的半球差异没有得到很好的证明。我们已经研究了这个问题，使用反应时间任务与视觉刺激呈现在右或左视野，并与同侧的手的反应。我们发现，在颜色加工过程中，大脑半球的不对称性显著，右侧优势显著。当我们使用非彩色刺激进行测试时，或者当我们在视野中心提供彩色刺激时，没有获得这种不对称。这些结果有力地表明，颜色加工在两个半球的差异与右半球的优势。本研究通过对颜色辨别的不对称性的研究，进一步探讨了颜色加工的半球优势。由于辨别加工是建立在分析加工基础上的，可能导致左半球的优势。另一方面，颜色辨别可能是由右半球主导的，就像我们之前得到的颜色检测一样。我们在两个任务中研究了这个问题，一个是有语言线索的颜色辨别，另一个是没有语言线索的。在这两种情况下的歧视任务导致左半球的优势，显示的颜色处理半球的不对称性;颜色检测更迅速地处理在右半球，而颜色歧视处理与左半球的优势。