人为什么会怕痒
时间：2019-02-16 作者：英语课 分类：英语听力广播—Listening
英语课
Why Can't You Tickle 1 YourselfHave you ever thought about why people are ticklish 2? According to scientists, ticklishness 3 is a defense 4 mechanism 5 humans developed against bugs 6, spiders, and other critters that may be touching 7 our skin. Feeling ticklish is our built-in response to predators 8 or threats, and combines the sensations of touch and pain.
The part of the brain that is associated with tickling 9 is the cerebellum. It monitors our movements, but ignores movements not perceived as a threat. For example, we do not notice our vocal 10 chords moving when we speak, but we may jump if someone touches us on the shoulder. This selective perception is probably the reason why we cannot tickle ourselves.
We only feel ticklish if we detect a sense of invasion or attack. If we try to tickle ourselves, our brains anticipate this "attack" and prevent us from feeling panicked. Strangely enough, even if a person knows that they are about to be tickled 11, the fear of being touched may cause the same "ticklish" reaction. Some people laugh even before being tickled. A scientific study was recently done in England to determine whether or not people can tickle themselves. Volunteers were attached to a brain-scanning device and were tickled on their palms with a piece of soft foam 12 . The participants' brain scans were monitored while they were being tickled, and when they tickled themselves. It was found that during self-tickling, the cerebellum alerted another area of the brain about what to expect, so the ticklish feeling was diminished. Researchers did find a way, however, for people to tickle themselves. When volunteers activated 13 a robot by remote control to tickle them after a short delay, the volunteers felt as if someone else were tickling them. It seems that the cerebellum sends a signal to disregard the forthcoming movement, then moves on to other things. Your brain "forgets" that you are tickling yourself—even with a delay as short as a fifth of a second. So it is possible to tickle yourself—but only by remote control. What will science discover next?
v.搔痒，胳肢；使高兴；发痒；n.搔痒，发痒
- Wilson was feeling restless. There was a tickle in his throat.威尔逊只觉得心神不定。嗓子眼里有些发痒。
- I am tickle pink at the news.听到这消息我高兴得要命。
adj.怕痒的；问题棘手的；adv.怕痒地；n.怕痒，小心处理
- This massage method is not recommended for anyone who is very ticklish.这种按摩法不推荐给怕痒的人使用。
- The news is quite ticklish to the ear,这消息听起来使人觉得有些难办。
n.防御，保卫；[pl.]防务工事；辩护，答辩
- The accused has the right to defense.被告人有权获得辩护。
- The war has impacted the area with military and defense workers.战争使那个地区挤满了军队和防御工程人员。
n.机械装置；机构，结构
- The bones and muscles are parts of the mechanism of the body.骨骼和肌肉是人体的组成部件。
- The mechanism of the machine is very complicated.这台机器的结构是非常复杂的。
adj.疯狂的，发疯的n.窃听器( bug的名词复数 )；病菌；虫子；[计算机]（制作软件程序所产生的意料不到的）错误
- All programs have bugs and need endless refinement. 所有的程序都有漏洞，都需要不断改进。 来自《简明英汉词典》
- The sacks of rice were swarming with bugs. 一袋袋的米里长满了虫子。 来自《简明英汉词典》
n.食肉动物( predator的名词复数 )；奴役他人者（尤指在财务或性关系方面）
- birds and their earthbound predators 鸟和地面上捕食它们的动物
- The eyes of predators are highly sensitive to the slightest movement. 捕食性动物的眼睛能感觉到最细小的动静。 来自《简明英汉词典》
反馈，回授，自旋挠痒法
- Was It'spring tickling her senses? 是不是春意撩人呢？
- Its origin is in tickling and rough-and-tumble play, he says. 他说，笑的起源来自于挠痒痒以及杂乱无章的游戏。
adj.直言不讳的；嗓音的；n.[pl.]声乐节目
- The tongue is a vocal organ.舌头是一个发音器官。
- Public opinion at last became vocal.终于舆论哗然。
（使）发痒( tickle的过去式和过去分词 )； （使）愉快，逗乐
- We were tickled pink to see our friends on television. 在电视中看到我们的一些朋友，我们高兴极了。
- I tickled the baby's feet and made her laugh. 我胳肢孩子的脚，使她发笑。