来自《耶鲁大学开放课程：生物医学工程探索 第21集 第21集》
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that's a measure of neural activity,它是对神经活动的一种反映 -
when blood oxygen goes up neural activity goes up,血氧水平上升时 神经活动会更剧烈 -
the extraction of oxygen goes up and the fMRI signal goes up.氧气消耗量上升 信号会增强 -
Here's an example of an fMRI image,这张图是功能磁共振图像 -
and actually the fMRI image isn't shown here.真的功能磁共振图并不像这里看到的这样 -
The fMRI image would be a blurry one功能磁共振图像是模糊的 -
like the one I showed you in the last slide.有点像我在上一张幻灯片给你们看的图 -
You might find regions你会发现一些区域 -
where there's high levels of activity,在进行剧烈地活动 -
and you would superimpose然后你要对相同的大脑 -
those on a static image of that same brain,再拍一张静态图像 -
so here two kinds of imaging were done.这样你就得到两张图像