肌张力异常性抽筋，是指当进行某个动作时，不需要用到的肌肉却在收缩。

Dystonic cramps are where a muscle that is not needed for a movement is contracted.

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已经确证，心肌收缩始于动作电位使肌膜去极化。

It is well established that the cardial contraction is initiated when an action potential depolarizes the sarcolemma.

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方法：记录蟾蜍坐骨神经干动作电位和腓肠肌收缩曲线，测定低位运动中枢、神经肌接头、骨骼肌出现疲劳的时间并加以比较。

Methods: By recording the action potential of sciatic trunk and contract curve of sural muscle of hoptoad, and measuring the time of fatigue in nerve centre, neuro-muscular junction and muscle.

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We're going to come back and talk about the action potential a little bit more when we talk about how the heart works, because the heart when its contracting, the muscle cells also use action potentials to initiate contraction.

我们讲心脏工作原理时,会回头再多讨论一点动作电位,因为心脏收缩时,肌肉细胞也利用动作电位来启动收缩

耶鲁公开课 - 生物医学工程探索课程节选