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为什么踩在乐高上伤害这么大

Why Does Stepping On a Lego Hurt So Bad?

生命不能承受之痛可能由
Soul crushing pain can come from
最不可能的情况造成
the most unlikely of sources.
像踩到一块
Like stepping on a little
两克的小塑料块
two-gram block of plastic.
但这如此无辜的
But how can something so innocent
东西是怎么造成这要命又
looking cause such extreme
费解的疼痛?
and mind bending kind of pain?
(Reactions介绍)
(Reactions SPLASH Intro)
疼痛感和生存息息相关
The feeling of pain is all about survival.
是我们身体使大脑
It’s our bodies way of letting our
知道危险临近的方式
brains know that danger is at foot.
在这种情况 事实上
In this circumstance, literally.
生理疼痛是一种化学过程
Physical pain is a chemical process,
我们说的疼痛
and when talking pain, you’re
是“伤害感受”
going to be talking nociception.
伤害感受器是身体里特别的感觉细胞
Nociceptors are special sensory cells
组成保护我们
in your body that are our first line of
的第一道防线
defense in keeping us out of harm’s way.
惊奇在于该词词根
Surprisingly, the root of the word,
“Nocer”在拉丁语中意为“伤害”
“Nocer” means “to hurt” in latin.
皮肤里有两种
In your skin, you have these two
不同的痛觉神经纤维
different types of pain sensing nerve
A-Delta和C纤维
fibers, A-Delta and C fibers with these specific tasks:
(视频上内容:A-delta 纤维:快速
(ONSCREEN TEXT: A-delta Fibers: quick
反应——感受急性疼痛、刺痛和戳痛 C纤维——反应
to respond — can sense acute, pricking, piercing pains C fibers: slower to
较慢——感受钝痛、灼痛,持续性疼痛)
respond — can sense dull, burning, lingering, pains)
踩乐高例子里 A-Delta细胞做了大部分工作
In the case of Lego stomping, A-Delta cells do most of the talking.
伤害感受器一经
When triggered, your nociceptors then
触发就向大脑传送电信号
send electrical signals to your brain,
说的大致是 “哎呦”
basically saying, “OW.” These signals
这些信号在化学物质
are propagated from the site of the
神经传导物质
pain (your foot) to your brain with the help of
帮助下 由脚传至大脑
chemicals called neurotransmitters.
这两种神经
These two neurotransmitters play
传导物质在疼痛
the largest role in pain, but there
机理中起了最大作用
are many more being studied and
不过仍需更多研究调查
researched (Glutamate Substance P).
有趣小知识:疼痛信息沿
Quick fun fact: Before the painful message
A-Delta纤维
travels ALL the way from your foot to
从脚完全传至大脑前
your brain along the path to the A-delta
你的伤害感受器刺激了
fibers, your nociceptors instigate what’s
所谓“缩回反射”即
called the “withdrawal reflex” —
大体上信息首先传递至
basically the message gets sent to the
脊髓 然后“通知”受伤
spinal cord first, which then informs
部位的运动神经元
your motor neurons in the affected area
以便离开危险地带
to get the heck out of here.
换句话说 你实际移动
So in other words, you actually move your
脚远离乐高的动作
foot away from the Lego before your
发生在大脑意识
brain has had a chance to comprehend the
到即将遭受无限痛苦之前
immeasurable pain you’re about to endure.
疼痛说到这里就足够了
So that’s enough about pain,
那么这些东西呢?
what about these little guys?
其原材料ABS塑料是
They’re made out of ABS Plastic,
很“聪明”的三元共聚物
which is a rather clever terpolymer.
“Ter”在拉丁语中意为三
“Ter” is Latin for thrice.
这很符合逻辑 原因在此
Pretty logical, here’s why.
这是丙烯腈
This is an Acrylonitrile butadiene
丁二烯苯乙烯聚合物链
styrene (ABS) polymer chain.
内有三个单体
Inside of it, there’s three monomers,
各自起着独一无二的作用
each with their own unique purposes.
丙烯腈
Acrylonitrile there is to
给了塑料块强度
give the plastic strength.
丁二烯使塑料提升
1,3-butadeine is there to give the plastic
对折断的抗性 苯乙烯
resistance from snapping, and styrene’s
给它闪亮坚硬的表面
in the house to give it that nice shiny, hard surface.
这三股力量结合起来使
With all three powers combined, these
砖块不会屈服于压力
bricks don’t give way under pressure.
特别是从你
Especially from the bottom of
柔软敏感的脚底传来的
your soft, sensitive foot.
所以当你踩在一个危险的
So when you step on one of these dangerous
小砖块 体重的
little bricks, the force of your weight
压力集中在接触点上
concentrates itself into the point of contact.
要是你像我一样不幸
And if you’re unlucky like me, that
经常刚好踩在这里
usually is right about here.
但为了简化问题 假设
But to simplify this example let’s just say
脚与上表面充分接触
you stepped on the full top surface.
你脚的底部可以有
Now the bottom of your foot can have up
200000个独立的感受器
to 200,000 individual sensory receptors
占据很小表面积
which is exceptionally dense given
自然分布极其密集
the small surface area they occupy.
那么 重165磅的普通人
Then, for an average person of 165lbs,
就有大约3百万帕的
there’s around 3 million pascals of
压强集中在
pressure being concentrated onto
小砖块的上表面
the top surface of the brick.
由于ABS塑料的
And thanks to the custom chemical
定制化学剪裁
tailoring of ABS Plastics that brick
在你体重压力下
doesn’t give up at all under the pressure
砖块完全没有屈服
of your weight, cramming it way up
而是挤进脚里 让
into your foot, giving your A Delta
A-Delta纤维肩负重任
fibers a lot to talk about.
朋友 小心乐高
So be careful out there folks.
广大乐高爱好者 我们想看到你
For all you Lego lovers out there, we want to see your
用小砖块建成的组合体
favorite compounds built out of bricks.
搭建砖块 照相 并
Build them up, take a picture and
贴在下方评论区
post them down in the comments!
顺便 如果你有任何
And while you’re at it, if you have any
化学方面的疑惑
chemistry questions, post them down
也可发评论
there in the comments as well
我们尽力回复
and we’ll try to get back to you.
想知道更多有关
If you want to learn more about what
你快死时发生在
happens to your body when your about
身体里的事 观看这个视频
to die, check out this video or if you
想了解辛辣食物
want to learn about spicy foods, another
另一类疼痛 观看这个
kind of pain, check out this one.
谢谢观看 离开时请点击
Thanks for watching folks, hit subscribe
订阅和赞
and hit thumbs up on the way out.

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视频概述

从人体神经系统传递痛觉原理和乐高材料特点两方面解释踩上乐高会非常痛苦的原因

听录译者

收集自网络

翻译译者

寂ZZ

审核员

译学馆审核员B

视频来源

https://www.youtube.com/watch?v=7HpE7oA-Fw8

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