So after three times, after four times, you also activate your vagus tone.

三次，四次后，你的迷也开始活跃了。

Once activated, they send a signal to your vagus nerve in your brain.

一旦激活，它们就会向你大脑中的迷发送信号。

So the chemical serotonin influences communication of the vagus nerve.

简而言，血清素影响着迷的信号传递。

And crucially, serotonin influences the signals that are sent from the gut to the brain through the vagus nerve.

关键在于，血清素会影响通过迷从肠道发送到大脑的信号。

But when researchers severed the vagus nerve, all of these improvements disappeared.

但当研究人员切断迷时，所有这些处都消失了。

Here you have two arms pressing against your visceral side, which provides a lot of comfort via the vagus nerve.

你的两只手臂压在你的内脏侧，这通过迷提供了很多安慰。

This left them wondering whether positive emotions and vagal tone drive one another in a virtuous spiral.

这为他们留下了疑念，积极情绪与迷张力是否处于一个良性循环中，互相促？

How effectively the vagus nerve is working can be tracked by monitoring someone's heart rate as he breathes in and out.

他们通过监测一个人吸气、呼气时的心率，追踪记录迷如何有效地工作。

And that longer exhale really is stimulating for your vagus nerve.

而那次较长的呼气确实能刺激你的迷。

That vagus nerve is like a highway.

那条迷就像一条高速公路。

That our vagus nerve also activates when we see another being in distress.

当我们目睹他人处于困境时，我们的迷也会被激活。

There's the dorsal vagal response, where your body starts, goes to sleep.

存在背侧迷反应，此时你的身体开始入一种近乎休眠的状态。

Researchers looking at legitimate vagus nerve stimulation.

研究人员正探讨合法的迷刺激法。

It's hard to trace the vagus nerve's thin, twisting branches through the body.

追踪迷那细小曲折的分支贯穿全身是很难的。

The common idea out there is that the vagus is associated with calming.

常见的看法是迷与放松有关。

It's actually activating that slow exhale is activating part of your body called the vagus nerve.

实际上，缓慢的呼气动作会激活你体内的一部分，称为迷。

And the vagus nerve is part of your parasympathetic nervous system, which helps your body relax.

迷是你的副交感系统的组成部分，有助于你的身体放松。

As its name suggests, it entails electrically stimulating the vagus nerve via an electrode implanted in the chest.

正如其名称所示，该方法通过在胸部植入电极来电刺激迷。

The difference yields an index of vagal tone, and the value of this index is known to be connected with health.

两次心率差构成迷张力指数。人们都知道该指数与健康程度有关。

Dr Fredrickson and Dr Kok concentrated their attentions on the vagus nerve.

弗雷德里克松博士和可可博士把注意力集中在迷上。