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Audio-visual presentation system for magnetoencephalogram measurements

用于脑磁图测量的视听演示系统

基本信息

批准号：
09551001
负责人：
OSAKA Naoyuki
金额：
$ 8万
依托单位：
KYOTO UNIVERSITY
依托单位国家：
日本
项目类别：
Grant-in-Aid for Scientific Research (B)
财政年份：
1997
资助国家：
日本
起止时间：
1997 至 1999
项目状态：
已结题

来源：
https://kaken.nii.ac.jp/grant/KAKENHI-PROJECT-09551001/
关键词：
brain magnetoencephalography Audio-visual stimulus MEG

项目摘要

We developed an audio-visual stimulus presentation system for measuring human magnetoencephalogram. When measuring evoked magnetic field from human brain in an electronically shielded chamber, any noisy resources originated from electronic stimulus presentation devices are strictly prohibited in order to measure noise-free high-quality magnetic field associated with psychological tasks. We developed noise-free presentation system using PC-based visual stimulus presentation system using mirror-based projection screen, in which any moving visual stimulus, i.e., motion, motion-aftereffect, apparent motion, could easily be presented on side or top wall screen in the chamber subject stayed in bed. Also audio presentation was developed in which subject could hear reading span test voice via noise-free speaker system. In addition, we developed the modified version of these for event-related brain potential experiments, in which similar electrically induced noise should be avoided but with weaker criterion. In event-related potential study, we made infra-red-based fiber communication line to detect subject's judgment in stead of electric button system. Software associated with these systems was also developed for working memory and visual perception experiments. The experiments done by using these system were reported in the report form and published papers are also reported.

我们开发了一个视听刺激呈现系统，用于测量人类脑磁图。在电子屏蔽室中测量人脑诱发磁场时，严格禁止任何来自电子刺激呈现设备的噪声源，以测量与心理任务相关的无噪声高质量磁场。我们开发了无噪声演示系统，使用基于PC的视觉刺激演示系统，使用基于镜子的投影屏幕，其中任何移动的视觉刺激，即，运动、运动后效、明显运动可以容易地呈现在室中的侧壁或顶壁屏幕上，受试者躺在床上。此外，还开发了音频演示，其中受试者可以通过无噪声扬声器系统听到阅读广度测试语音。此外，我们开发了修改后的版本，这些事件相关的脑电位实验中，类似的电诱导噪声应避免，但较弱的标准。在事件相关电位研究中，我们制作了红外线光纤通信线路来检测被试的判断，代替了传统的电按钮系统。与这些系统相关的软件也被开发用于工作记忆和视觉感知实验。用这些系统所做的实验以报告的形式报道，并发表了论文。