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

三次，四次之后，迷走神经也开始活跃了。

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

一旦激活，它们就会向大脑中迷走神经信号。

So the chemical serotonin influences communication of the vagus nerve.

简而言之，血清素影响着迷走神经信号传递。

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走神经从肠到大脑信号。

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

但当研究人员切断迷走神经时，所有这些改进之处都消失了。

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

两只手臂压在脏侧，这通过迷走神经提供了很多安慰。

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，积极情绪与迷走神经张力是否处于一个良性循环之中，互相促进？

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、呼气时心率，追踪记录迷走神经如何有效地工作。

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

而那次较长呼气确实能刺激迷走神经。

That vagus nerve is like a highway.

那条迷走神经就像一条高速公路。

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，我们迷走神经也会被激活。

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

存在背侧迷走神经反应，此时身体开始进入一种近乎休眠状态。

Researchers looking at legitimate vagus nerve stimulation.

研究人员正探讨合法迷走神经刺激法。

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

追踪迷走神经那细小曲折分支贯穿全身是很难。

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

常见看法是迷走神经与放松有关。

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

实际上，缓慢呼气动作会激活体一部分，称为迷走神经。

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

迷走神经是副交感神经系统组成部分，有助于身体放松。

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走神经。

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

两次心率之差构成迷走神经张力指数。人们都知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走神经上。