The researchers called the condition "REM without atonia" or REM-A.

研究人员把这一状态称为“张力缺失的快速眼动”。

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If this relaxation, or atonia, occurs while the person is awake, it can cause temporary paralysis.

但如果这种放松，或弛缓发生在人清醒的时候，它就会导致暂时性身体瘫痪。

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The electrophysiologic substrate for RBD on polysomnography is rapid eye movement sleep without atonia.

RBD多导睡眠图的电生理基础是无张力减低的快动眼睡眠。

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It could be that the caffeine in the chocolate is causing atonia.

BBC: Chocolate linked to nightmares