有声英语阅读 | 为什么鼻子每次只堵一边?

2022-02-08 09:05:33  每日学英语

I’ll bet most people don’t realize that when you breathe through your nose, you do so more from one nostril than the other and your body knows to switch to the other nostril every few hours.

我敢打赌大多数人都没有意识到,当你呼吸时,你只用其中一个鼻孔呼吸的次数会比另一个多,而且你的身体知道每隔几个小时就要换另一个鼻孔呼吸。

I had no idea. I’m only aware of any difference in my nostrils when I’m congested!

我完全不知道。只有在鼻塞的时候才会感觉到鼻孔有什么不同。

This nasal cycle is controlled by the autonomic nervous system which also controls things we don’t think about like heart rate and breathing. Our bodies deliberately send more blood to an erectile tissue between the two nostrils to increase its size and direct the air flowing through one of the nostrils. After a few hours, the airflow switches to the other nostril.

这个鼻腔循环是由自主神经系统控制的,自主神经系统也控制着许多不需要我们思考的事情,比如心率和呼吸。我们的身体故意将更多的血液输送到两个鼻孔之间的勃起组织,通过变化增加它的大小,引导空气通过其中一个鼻孔。几个小时后,气流切换到另一个鼻孔。

Why do we do this? Some scientists believe the alternating airflow allows each nostril to maintain optimal moisture levels so no one side gets dried out. It may also protect against respiratory infections or allergies.

为什么会这样呢?一些科学家认为,交替的气流可以让每个鼻孔都保持最佳的湿度,这样就不至于使某边的鼻孔变干。它还可以防止呼吸道感染或过敏。

Others believe it’s tied to our olfaction or sense of smell. It’s possible that the quicker and slower airflow in each nostril optimizes us to the vast range of smells. Some smells take longer to detect and transmit to the brain.

另一些人认为它与我们的嗅觉有关。可能是每个鼻孔内的快气流和慢气流使我们对各种各样的气味有了最佳的适应能力。有些气味需要更长的时间来探测和传递到大脑。

But there’s no easy answer because our nasal cycle changes with our body’s position and age. Right handed people appear to breathe more through their left nostril. The cycle may also be related to heart rate, blood pressure, blood glucose levels, how much we blink, autism, fever, and much more.

但是,随着身体的位置和年龄的变化,鼻子的循环也会发生变化,因此很难找到答案。右撇子的人似乎更多地通过左鼻孔呼吸。这个周期也可能与心率、血压、血糖水平、眨眼次数、自闭症、发烧等等有关。

The reason we’re aware of breathing more through one nostril when we’re sick is that when we’re congested, the side with less airflow just feels more blocked. Really, so much of this function is a mystery.

当我们生病时,我们会意识到有一个鼻孔会堵的原因是,当我们鼻塞时,气流较少的那一侧会感觉明显。实际上,这个功能的很多部分都是一个谜。

The next time you have nothing else to think about, see which nostril you are using more. Maybe one day we’ll know why this happens and it’ll lead to some pretty useful treatments.

下次你没有其他事情可想的时候,你可以看看你更多用哪个鼻孔呼吸。也许有一天我们会知道为什么会发生这种情况,这将引导我们发现一些非常有用的治疗方法。

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