Thermoreceptors respond to temperature changes, while nociceptors sense pain.

温度感受器对温度变化有反应，而伤害感受器会感知到疼痛。

Well that tack in your flesh is that something. And it snaps those nociceptors to attention.

你肉里的图钉就是那个事情。它会让那些伤害感受器注意到。

Your peripheral nervous system's mechano- and nociceptors provided that base sensation, or awareness that something had changed.

你的外周神经系统的机械感受器和伤害感受器提供了基本的感觉，或者说意识到某事发生了变化。

For example, some nociceptors are attached to fibers with slightly more conductive, fatty myelin than others.

例如，有些伤害感受器依附于神经纤维，就会更具有传导作用，髓磷脂所富含的脂肪也更多一些。

It actually activates nociceptors (the cells specialized in the sensation of pain), an experience that dogs don't like at all.

它实际上激活伤害感受器（专门用于疼痛感觉的细胞），这是狗一点也不喜欢的体验。

Some detect temperature, some detect touch, while others called nociceptors exclusively detect pain.

一些检测温度，一些检测触觉，而另一些称为伤害感受器的则专门检测疼痛。

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

但你越用力推针尖，越接近痛觉感受器的阈值。

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

某些化学物质可以调节感受器，降低痛觉的阈值。

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，痛觉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，痛觉感受器启动，告诉身体停止目前的行为。