You bring somebody in the sleep lab, you put electrodes on their scalp and you see what these-- what sort of electrical activities you get in the brain.

把人叫来睡眠实验室，把电极贴在他们的头皮上,你就能看到-,他们有什么脑电活动。

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It's my sleep technicians, and they've brought along an enormous suitcase of electrical equipment.

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"Any electrical stimulus in the bedroom in the middle of the night is certainly going to impair sleep, " says Lauren Hale, Ph.

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It is the movement of potassium (and also sodium) ions that causes the electrical impulses that nerve cells carry including the impulses found in slow-wave sleep.

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