VOA慢速英语 2008 0226b

VOICE ONE:

This is SCIENCE IN THE NEWS in VOA Special English.  I'm Barbara Klein. 

VOICE TWO:

 
 
And I'm Bob Doughty¹.  Today we tell about headaches, the head pain that strikes almost everyone at some time.

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VOICE ONE:

Have you had a headache recently?  If your answer is yes, you are like many millions of people worldwide who experience pain in the head.  The pain can be temporary, mild and cured by a simple painkiller² like aspirin³.  Or, it can be severe.

The National Headache Foundation says more than forty five million people in the United States suffer chronic⁴ headaches.  Such headaches cause severe pain that goes away but returns later.

Some headaches may prove difficult and require time to treat.  But many experts today are working toward cures or major help for chronic headaches. 

VOICE TWO:

The US Headache Consortium is a group with seven member organizations.  They are attempting to improve treatment of one kind of headache -- the migraine.  Some people experience this kind of pain as often as two weeks every month.  The National Headache Foundation says about seventy percent of migraine sufferers are women. 

Some people describe the pain as similar to a repeated beat.  Others compare it to someone driving a sharp object into the head.  Migraine headaches cause Americans to miss more than one hundred fifty million workdays each year.  A migraine can be mild.  But it also can be so severe that a person cannot live a normal life.

VOICE ONE:

One migraine sufferer lives in Ellicott City, Maryland.  Video producer Curtis Croley had head pain as a child.  He does not know what kind of headaches they were.  But when he suffered severe headaches as an adult, doctors identified the problem as migraine. 

Today, Mister Croley says months can pass without a headache.  But then he will have three migraines within a month.  If he takes the medicine his doctor ordered early in his headache, it controls the pain.  If not, the pain in his head becomes extremely bad.  Sometimes he has had to be treated with a combination of drugs in a hospital. 

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VOICE TWO:

Some people take medicine every day to prevent or ease migraine headaches.  Others use medicine to control pain already developed.  Doctors treating migraine sufferers often order medicines from a group of drugs known as triptans.

Most migraines react at least partly to existing medicine.  And most people can use existing medicine without experiencing bad effects.  Doctors sometimes use caffeine to treat migraine headaches.  Interestingly, caffeine also can cause some migraines. 

VOICE ONE:

Medical experts have long recognized the work of the Mayo Clinic in Rochester, Minnesota.  The Mayo Clinic says several foods are suspected of causing migraines.  Cheese and alcoholic⁵ drinks are among them.  Food additives⁶ like nitrates and monosodium glutamate also are suspected causes.

The Mayo Clinic tells patients to avoid strong smells that have seemingly started migraines in the past.  Some people react badly to products like perfume, even if they have a pleasant smell.  

The Clinic's experts say aerobic⁷ exercise can help migraine sufferers.  Aerobic exercise increases a person's heart rate.  It can include walking, swimming or riding a bicycle.  But a sudden start to hard exercise can cause headaches.

The experts advise that people should plan to exercise, eat and sleep at the same times each day.  

VOICE TWO:

The Mayo Clinic has advice about estrogen for women who suffer from migraines.  The female body makes estrogen.  Drugs like birth control pills contain a version of this chemical.

Such medicines may produce headaches or cause them to worsen, the Clinic says.  The same is true for estrogen replacement⁸ drugs for women.  Doctors sometimes order estrogen replacement for women who no longer able to have children. 

VOICE ONE:

The Clinic also says hypnotherapy might help suppress headaches.  It says the method could reduce the number and severity of a patient’s headaches.  In hypnotherapy, willing people are placed in a condition that lets them receive suggestions.  They look like they are sleeping.  The suggestions they receive may be able to direct their whole mental energy against pain.

The Mayo Clinic says the hypnotizer can never control the person under hypnosis.  It also says the hypnotized person will remember what happened during the treatment.

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VOICE TWO:

More people suffer tension headaches than migraines.  But most tension headaches are not as powerful. 

Events that start tension headaches may include emotional pressure and the deeper than normal sadness called depression.  Other tension headaches can start from something as simple as tiredness.  Common changes in atmospheric⁹ conditions also can be responsible.

The Mayo Clinic says you may feel a tension headache as tightness in the skin around your eyes.  Or, you may feel pressure around your head.  Episodic tension headaches strike from time to time.  Chronic tension headaches happen more often.  A tension headache can last from a half hour to a whole week.            

VOICE ONE:

The Mayo Clinic says the pain may come very early in the day.  Other signs can include pain in the neck or the lower part of the head.  Scientists are not sure what causes tension headaches.  For years, researchers blamed muscle tension from tightening¹⁰ in the face, neck and the skin on top of the head.  They believed emotional tension caused these movements.

But that belief has been disputed.  A test called an electromyogram shows that muscle tension does not increase in people with a tension headache.  The test records electrical currents caused by muscle activity.  Such research has caused the International Headache Society to re-name the tension headache.  The group now calls it a tension-type headache.

VOICE TWO:

Some scientists now believe that tension headaches may result from changes among brain chemicals such as serotonin.  The changes may start sending pain messages to the brain.  These changes may interfere¹¹ with brain activity that suppresses pain. 

Medicines for tension headache can be as simple as aspirin or other painkillers¹².  But if your pain is too severe, you will need a doctor's advice.

VOICE ONE:

A web site called Family Doctor dot org provides information from the American Academy of Family Physicians.  The group suggests steps to ease or end a tension headache.

For example, it says putting heat or ice on your head or neck can help.  So can standing¹³ under hot water while you are getting washed.  The group also advises exercising often.  Another idea is taking a holiday from work.  But you had better ask your employer first. 

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VOICE TWO:      

Ask anyone with a cluster headache, and they will tell you that the pain is terrible.  The Cleveland Clinic Headache Center in Ohio says the cluster headache can be many times more intense than a migraine. 

Cluster headaches usually strike young people.  Smokers¹⁴ and persons who drink alcohol often get these headaches.  Men are about six times more likely than women to have them.  The Cleveland Clinic says this is especially true of younger men.  Doctors say cluster headaches often strike during changes of season.

Cluster headache patients describe the pain as burning.  The pain is almost always felt on one side of the face.  It can last for up to ninety minutes.  Then it stops.  But it often starts again later the same day.  Eighty to ninety percent of cluster headache patients have pain over a number of days to a whole year.  Pain-free periods separate these periods.  

VOICE ONE:

The Cleveland Clinic says the cause of cluster headaches is in a brain area known as a trigeminal-autonomic reflex pathway.  When the nerve is made active, it starts pain linked to cluster headaches.  The nerve starts a process that makes one eye watery¹⁵ and red.

Studies have shown that activation¹⁶ of the trigeminal nerve may come from a part of the brain called the hypothalamus.  The Cleveland Clinic says injections of the drug sumatriptan can help.  Many other drugs also could be used.  For example, doctors say breathing oxygen also can help.

Thankfully, modern medicine has ways to treat almost all of our headaches. 

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VOICE TWO:

This program was written by Jerilyn Watson and produced by Brianna Blake.  I'm Bob Doughty.

VOICE ONE:

And I'm Barbara Klein.  Read and listen to our programs at voaspecialenglish.com.  Join us again next week for more news about science in Special English on the Voice of America.

 

1 doughty   

adj.勇猛的，坚强的

参考例句：

• Most of successful men have the characteristics of contumacy and doughty.绝大多数成功人士都有共同的特质：脾气倔强，性格刚强。
• The doughty old man battled his illness with fierce determination.坚强的老人用巨大毅力与疾病作斗争。

2 painkiller   

n.止痛药

参考例句：

• I shall persuade him to take the painkiller.我将说服他把药吃下去。
• The painkiller only provides him a short respite from his pain.止痛药仅仅让他在疼痛中有短暂的疏解。

3 aspirin   

n.阿司匹林

参考例句：

• The aspirin seems to quiet the headache.阿司匹林似乎使头痛减轻了。
• She went into a chemist's and bought some aspirin.她进了一家药店，买了些阿司匹林。

4 chronic   

adj.(疾病)长期未愈的，慢性的；极坏的

参考例句：

• Famine differs from chronic malnutrition.饥荒不同于慢性营养不良。
• Chronic poisoning may lead to death from inanition.慢性中毒也可能由虚弱导致死亡。

5 alcoholic   

adj.（含）酒精的，由酒精引起的；n.酗酒者

参考例句：

• The alcoholic strength of brandy far exceeds that of wine.白兰地的酒精浓度远远超过葡萄酒。
• Alcoholic drinks act as a poison to a child.酒精饮料对小孩犹如毒药。

6 additives   

n.添加剂( additive的名词复数 )

参考例句：

• chemical additives in petrol 汽油中的化学添加剂
• It'says on the packet that these crisps contain no additives. 包装上说这些炸薯片不含添加剂。 来自《简明英汉词典》

7 aerobic   

adj.需氧的，增氧健身法的，有氧的

参考例句：

• Aerobic exercise helps to build up stamina.有氧健身操有助于增强耐力。
• Aerobic dance is conductive to the health.有氧舞蹈有助于健康。

8 replacement   

n.取代，替换，交换；替代品，代用品

参考例句：

• We are hard put to find a replacement for our assistant.我们很难找到一个人来代替我们的助手。
• They put all the students through the replacement examination.他们让所有的学生参加分班考试。

9 atmospheric   

adj.大气的，空气的；大气层的；大气所引起的

参考例句：

• Sea surface temperatures and atmospheric circulation are strongly coupled.海洋表面温度与大气环流是密切相关的。
• Clouds return radiant energy to the surface primarily via the atmospheric window.云主要通过大气窗区向地表辐射能量。

10 tightening   

上紧，固定，紧密

参考例句：

• Make sure the washer is firmly seated before tightening the pipe. 旋紧水管之前，检查一下洗衣机是否已牢牢地固定在底座上了。
• It needs tightening up a little. 它还需要再收紧些。

11 interfere   

v.(in)干涉，干预；(with)妨碍，打扰

参考例句：

• If we interfere, it may do more harm than good.如果我们干预的话，可能弊多利少。
• When others interfere in the affair,it always makes troubles. 别人一卷入这一事件，棘手的事情就来了。

12 painkillers   

n.止痛药( painkiller的名词复数 )

参考例句：

• The doctor gave him some painkillers to ease the pain. 医生给了他一些止疼片以减缓疼痛。 来自辞典例句
• The primary painkillers - opiates, like OxyContin - are widely feared, misunderstood and underused. 人们对主要的镇痛药——如鸦片剂奥施康定——存在广泛的恐惧、误解，因此没有充分利用。 来自时文部分

13 standing   

n.持续，地位；adj.永久的，不动的，直立的，不流动的

参考例句：

• After the earthquake only a few houses were left standing.地震过后只有几幢房屋还立着。
• They're standing out against any change in the law.他们坚决反对对法律做任何修改。

14 smokers   

吸烟者( smoker的名词复数 )

参考例句：

• Many smokers who are chemically addicted to nicotine cannot cut down easily. 许多有尼古丁瘾的抽烟人不容易把烟戒掉。
• Chain smokers don't care about the dangers of smoking. 烟鬼似乎不在乎吸烟带来的种种危害。

15 watery   

adj.有水的，水汪汪的；湿的，湿润的

参考例句：

• In his watery eyes there is an expression of distrust.他那含泪的眼睛流露出惊惶失措的神情。
• Her eyes became watery because of the smoke.因为烟熏，她的双眼变得泪汪汪的。

16 activation   

n. 激活，催化作用

参考例句：

• A computer controls the activation of an air bag.电脑控制着气囊的启动。