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.

众所周知，左半球在语言和分析处理中占主导地位，而右半球在情感和整体处理中占主导地位。颜色信号处理中的半球差异尚未得到充分记录。我们已经使用反应时间任务来研究这个问题，其中视觉刺激出现在右侧或左侧视野中，并由同侧手做出反应。我们发现显着的半球不对称性在颜色处理中具有正确的优势。当我们使用消色差刺激进行测试时，或者当我们在视野中心呈现颜色刺激时，没有获得这种不对称性。这些结果强烈表明，两个半球的颜色处理是有差异的，其中右半球占主导地位。本研究通过研究颜色辨别的不对称性，进一步探讨了半球在颜色处理中的主导地位。由于辨别处理基于分析处理，因此可能导致左半球优势。另一方面，颜色辨别可能是用右半球优势来处理的，就像我们之前获得的颜色检测的情况一样。我们通过两项任务研究了这个问题，一项任务有用于颜色辨别的语言线索，另一项任务没有语言线索。在这两种情况下，辨别任务都导致左半球占优势，表明颜色处理具有半球不对称性；颜色检测在右半球处理得更快，而颜色辨别则在左半球优势处理。