評論
打印
Kids don't try this at home!
小孩子不要在家嘗試以下實驗！
Here is a question for mom and dad.
這里有一個給老爸老媽準備的問題。
Have you ever dipped your toe into a very hot bath and felt a flash of icy cold just before you realize that its really burning?
你是否嘗試過把腳趾伸進很燙的浴盆里卻感到瞬間的冰冷，回過神來才意識到水是滾燙的？
After you pull your toe out, you might wonder what causes very hot water to feel cold.
也許抽出腳趾之后你很想知道，是什么原因讓人覺得這滾燙的熱水很冷。
This odd sensation is called paradoxical cold.
這種怪異的感受稱為詭冷覺，
It is when something very hot feels cold and painful.
一些非常熱的事物感到寒冷和痛苦。
It is caused by the temperature receptors in the skin.
其實是皮膚內的溫度感受器在作祟。
There are separate, specific receptors that respond to decreases or increases in skin temperature.
皮膚內分布著獨立的專門感受器，能對皮膚溫度的升降作出反應。
If skin temperature drops, the cold receptors fire and if it increases, the warmth receptors fire.
如果皮膚溫度下降了，冷感受器就發出警告，如果皮膚溫度上升了，暖感受器則發出警告。
However, if a strong stimulus, like very hot water, can stimulate not only the warmth receptors but also stimulate the pain receptors.
可是，如果遇到很強烈的外部刺激，比如很燙的水，不僅能激發暖感受器，而且會激發痛感受器。
These warn us that we are doing ourselves damage, and should take action to prevent it.
這些反應提醒我們，我們正在傷害自己，應該馬上采取措施制止傷害的繼續。
The strong stimulus can also cause the abnormal stimulation of the cold receptors.
這種強烈的刺激也會導致冷感受器被異常激發。
So over-stimulation can cause the confusing sensation of cold, hot and pain,
過度刺激會使人體對冷、暖和痛覺的感受發生錯亂，
but as long as we're clear about pulling the toe out to safety, paradoxical cold is just another strange trick of the senses.
但只要我們清醒地意識到應該把腳趾挪到安全的地方，詭冷覺也只是一種奇怪的感官游戲而已。
