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Frontal theta EEG rhythms appeared during continuous attention to dominant eye reflect attention level during binocular rivalry

持续关注优势眼期间出现的额叶θ脑电图节律反映了双眼竞争期间的注意力水平

基本信息

批准号：
17500173
负责人：
ASADA Hiroshi
金额：
$ 2.24万
依托单位：
Osaka Prefecture University
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (C)
财政年份：
2005
资助国家：
日本
起止时间：
2005 至 2006
项目状态：
已结题

项目摘要

Binocular rivalry and attention both involve selection of visual stimuli and suppression of unattended information. In this study, we explored whether the frontal midline theta electroencephalogram rhythm (Fm-theta)_which was thought to reflect focused voluntary attention, was related to suppression of information from the suppressed eye in binocular rivalry. When subjects were asked to play a computer game using the left eye, a gray screen image was presented to the right eye using a monocular head-mounted display (HMD). An alphabet letter was randomly flashed on the HMD and subjects were asked to report whether they saw it or identify it, while EEGs were recorded. During the game, half of the subjects displayed Fm-theta and a ratio of detected letters was significantly less than that of the other subjects (who didn't show Fm-theta). Of the Fm-theta positive subjects, Fm-theta disappeared when the letters were visible, but was sustained when the letters were not seen. Visual evoked potentials evoked by detected letters could not be evoked when letters were undetected, but P300-like deflection was observed in place of them. Above data suggest that attention level for the dominant image during Fm-theta appearance might be higher than that seen during Fm-theta, disappearance. We hypothesize that, in the Fm-theta positive subjects, there is greater receipt of information from the dominant eye during binocular rivalry, while there is stronger suppression to the receipt of information through the V1 area from the suppressed eye. Perceptive suppression on the extrageniculate system may be ineffective, even during concentrated attention.

双眼竞争和注意都涉及视觉刺激的选择和对未被注意的信息的抑制。在这项研究中，我们探讨了额叶中线θ脑电图节律（Fm-θ），这被认为是反映集中的自愿注意，是否与抑制的信息从抑制眼双眼竞争。当受试者被要求用左眼玩电脑游戏时，使用单眼头戴式显示器（HMD）向右眼呈现灰色屏幕图像。一个字母在HMD上随机闪现，受试者被要求报告他们是否看到或识别它，同时记录EEG。在游戏过程中，一半的受试者显示了Fm-θ，并且检测到的字母的比率明显低于其他受试者（没有显示Fm-θ）。在Fm-θ阳性受试者中，当字母可见时，Fm-θ消失，但当字母不可见时，Fm-θ持续存在。当未检测到字母时，由检测到的字母诱发的视觉诱发电位不能被诱发，但观察到P300样偏转。上述数据表明，在Fm-θ出现期间对主导图像的注意水平可能高于在Fm-θ消失期间所看到的注意水平。我们假设，在Fm-θ阳性的科目，有更多的接收信息的优势眼在双眼竞争，而有更强的抑制，通过V1区从抑制眼的信息接收。对膝状体外系统的知觉抑制可能是无效的，即使是在集中注意力的情况下。