I've always wondered how does my sense of pain compare to other people's sense of pain.

我一直想知道我的痛和别人的痛如何。

Once activated, the trigeminal nerve transmits pain signals.

一旦被激活，三叉神经会传递痛信号。

During a migraine, this pain pathway becomes sensitized, meaning the threshold for provoking pain is lowered.

当偏头痛发作时，这个痛通路会变得敏感化，意思能触发痛的阈值下降了。

Posture can even influence your emotional state and your sensitivity to pain.

姿势甚至可以影响你的精神状态以及你对痛的敏感度。

Sense of touch and pain, do something totally different and it wasn't known how they do it.

触和痛的作用完全不同的，我们不知道它们如何作用。

And because your retinas don't have any pain receptors, your eyes have no way of warning you to stop.

而且因为你的视网膜没有痛感受器，你的眼睛无法警告你停下来。

Damage to the spinothalamic tract causes a loss of temperature and pain sensation.

损伤脊髓丘脑束可以导致痛和温度丧失。

The brain doesn't have pain receptors, so you can't feel the blockage itself.

大脑没有痛感受器，所以你感不到阻塞本身。

In a normal functioning human, motor response to pain is natural reflex.

对于正常人而言，对痛产生运动一种自然应。

Now, the harder you push against the needle, the closer you get to the nociceptor threshold.

但你越用力推针尖，越接近痛感受器的阈值。

When you eat something spicy, the pain receptors in your mouth initiate your body’s heat response.

当你吃辣的东西时，你嘴里的痛感受器会启动你身体的热应。

Without a scab to protect the exposed tissue, every little thing you do can stimulate pain receptors.

如果没有结痂来保护暴露的组织，您所做的每一件小事都会刺激痛感受器。

Certain chemicals can tune nociceptors, lowering their threshold for pain.

某些化学物质可以调节感受器，降低痛的阈值。

But the pain threshold isn't set in stone.

痛感受器的阈值并非一成不变。

But, unlike other nerve cells, nociceptors only fire if something happens that could cause or is causing damage.

不像其他神经细胞，痛感受器只在可能或正在造成伤害时才会作用。

Push hard enough, and you'll cross that threshold and the nociceptors fire, telling your body to stop doing whatever you're doing.

很用力的话，就会超过阈值，痛感受器启动，告诉身体停止目前的行为。

They showed that the drug interrupts the production of certain chemicals called prostaglandins, which control the transmission of pain sensations and inflammation.

他们表明，这种药物会中断某些称为前列腺素的化学物质的产生，这种化学物质控制痛和炎症的传递。

This results in a loss of sensations like pain, temperature, touch, as well as paralysis or loss of muscle function in some parts of the body.

这会导致感丧失（包括痛、温度、触）以及身体某些部位的肌肉瘫痪或功能丧失。

Skin sensations like touch, temperature, pain and pressure are carried to the spinal cord and then to the brain where we register the sensations.

皮肤感，如触、温度、痛与压力等，由上述神经传递至脊髓，最后到大脑，使我们能感知到。

This ischemia is thought to trigger release of adenosine, bradykinin, and other molecules that stimulate nerve fibers in the myocardium that result in the sensation of pain.

心内膜下缺血被认为启动腺苷、缓激肽等分子的释放，这些分子刺激心肌层神经末梢，导致痛产生。