An MRIscan of the women's brains showed that the region corresponding to signals from the vagus nerve was active.
这些女性的大脑核磁共振扫描显示,反馈迷走神经信号的相应区域是活动的。
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If these techniques fail, researchers could perform an MRIscan on the container, but this option is expensive and would involve transporting the half-ton coffin to a hospital.