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The Science of Memory: An Infinite Loop in the Brain

Jill Price can rattle off, without hesitation, what she saw and heard on almost any given date. She remembers many early childhood experiences and most of the days between the ages of 9 and 15. There are virtually no gaps in her memory.

She can also date events that were reported in the media, provided she heard about them at the time. When and where did the Concorde crash? When was O.J. Simpson arrested? When did the second Gulf War begin? Price doesn't even have to stop and think. She can effortlessly recite the dates, numbers and entire stories.

“People say to me: Oh, how fascinating, it must be a treat to have a perfect memory,” she says. Her lips twist into a thin smile. “But it's also agonizing.”

In addition to good memories, every angry word, every mistake, every disappointment, every shock and every moment of pain goes unforgotten. Time heals no wounds for Price. “I don't look back at the past with any distance. It's more like experiencing everything over and over again, and those memories trigger exactly the same emotions in me. It's like an endless, chaotic film that can completely overpower me. And there's no stop button.”

Can someone who cannot forget even fall in love? Can they forgive, either others or themselves? Price's life has had its share of suffering, including family strife, her mother's cancer and, later, the sudden death of her husband Jim. Because she was hounded by bad memories, grew depressed and feared that she was going crazy, she sat in front of her computer on June 5, 2000 and typed a single word into Google: memory.

That was how Price found James McGaugh, and became part of a scientific case study.

McGaugh is one of the leading experts on memory in the United States. He founded the Center for the Neurobiology of Learning and Memory at the University of California in Irvine.

“I was skeptical, of course, when Jill told me her story,” says McGaugh, a slim, grey-haired man with glasses. “But I've spent most of my life studying the mechanisms in the brain that are associated with the development of lasting memories. So I thought that I should at least meet the woman.”

McGaugh and his staff realized they were looking at an exotic case, perhaps even a scientific sensation. For that reason they took a thorough approach, and for five years they subjected Price to batteries of neuropsychological（神经心理学的）tests, combed the professional literature for similar cases and developed special questionnaires to allow them to test her memory.

Once she was asked to write down the dates of all Easter holidays from 1980 to 2003. “It took her 10 minutes, and she only got one of the 24 dates wrong, where she was off by two days,” says McGaugh. He had Price repeat the test two years later, and the second time she got all the dates right. “I thought that was especially impressive,” says McGaugh, “because she is Jewish. Easter means nothing to her.”

McGaugh and his colleagues concluded that Price's episodic memory, her recollection of personal experiences and the emotions associated with them, is virtually perfect. A case like this has never been described in the history of memory research, according to McGaugh. He explains that Price differs substantially from other people with special powers of recall, such as autistic savants（自闭学者）, because she uses no strategies to help her remember and even does a surprisingly poor job on some memory tests.

It's difficult for her to memorize poems or series of numbers—which helps explain why she never stood out in school. Her semantic memory, the ability to remember facts not directly related to everyday life, is only average.

Two years ago, the scientists published their first conclusions in a professional journal without revealing the identity of their subject. Since then, more than 200 people have contacted McGaugh, all claiming to have an equally perfect episodic memory. Most of them were exposed as fakes. Three did appear to have similarly astonishing abilities.“Their personalities are very different. The others are not as anxious as Jill. But they achieve comparable results in the tests,” McGaugh reports. The subjects do have certain compulsive traits in common, says McGaugh, especially compulsive hoarding.

In neurobiological terms, a memory is a stored pattern of links between nerve cells in the brain. It is created when synapses in a network of neurons are activated for a short time. The more often the memory is recalled afterwards, the more likely it is that permanent links develop between the nerve cells—and the pattern will be stored as a long-term memory. In theory there are so many possible links that an almost unlimited number of memories can be permanently stored.

So why don't all people have the same powers of recollection as Jill Price? “If we could remember everything equally well, the brain would be hopelessly overburdened and would operate more slowly,” says McGaugh. He says forgetting is a necessary condition of having a viable memory—except in the case of Price and the other three memory superstars.

For McGaugh, there is another reason why people with such phenomenal memory are so puzzling. They challenge a theory on which his research has been based for the last half a century. This theory, based on clinical observation, says memories are stored in greater detail and with more staying power when they are tied to emotion.

Sensations are emotionally processed in the amygdala, a specific part of the brain's limbic system. There decisions are made as to which information should remain in long-term memory. The more powerfully the amygdala is activated, the greater the likelihood of a permanent memory. “But now here we have these four people who seem to violate this principle, because they also remember the most banal and inconsequential things,” says McGaugh.

1. When people admire Price's perfect memory, she shows a thin smile because _____.

A. it just brings her good memory

B. it also causes her some troubles

C. she appreciates those praises

D. she is gifted by God

2. Price became depressed and was afraid that she was going crazy because _____.

A. her husband Jim died suddenly

B. she feared about the future

C. she didn't know why her memory was so perfect

D. she was wrenched by bad memories consistently

3. When McGaugh first heard Price's story, _____.

A. he felt she was an odd woman

B. he determined to cure he

C. he thought it unimaginable

D. he didn't plan to meet her

4. When first was asked to write down the dates of all Easter holidays from 1980 to 2003, how many mistakes did Price make?

A. One.

B. Two.

C. Twenty-two.

D. Twenty-four.

5. Price didn't study very well because _____.

A. she preferred to learn poems only

B. she had difficulties memorizing series of numbers

C. she only remembered facts that directly related to daily life

D. she didn't pay much attention to her study

6. The other three subjects with perfect episodic memory _____.

A. had different abilities

B. has different personalities

C. were as anxious as Price

D. achieved different results in the tests

7. In neurobiological terms, memories can be permanently stored when _____.

A. they are stored as pattern of links between nerve cells

B. synapses in a network of neurons are activated for a short time

C. they are stored in more nerve cells in the brain

D. permanent links develop between the nerve cells

8. For common people, _____ is a necessary condition of having a viable memory.

9. McGaugh's research was based on the theory that memories are stored in greater detail when _____.

10. Price and the other three subjects violated McGaugh's theory in that they also remember _____ things.

文章精要：

Jill Price的记忆力非常好，殊不知在别人艳羡的背后，她经受着痛苦的折磨。科学家McGangh对她的情况进行了研究，至今仍无定论。

答案解析：

1. B　根据题干信息词thin smile定位到第三段末句。文章提到，当人们都夸赞Price的非凡记忆力时，她总是撇嘴一笑。她说记性好也使她很烦恼，即记性好给她带来了很多麻烦，故选B。

2. D　根据题干信息词depressed和going crazy定位到第五段末句。文章提到，由于一些不愉快的记忆一直纠缠她，她变得越来越压抑，害怕自己会疯掉。所以这些不好的记忆是在折磨她，故D正确。hound意为“追捕，追逐”，常指被坏的事物纠缠；wrench意为“折磨”。

3. C　根据题干信息词first heard定位到第八段首句。文中提到，当McGaugh听说了Price的故事后表示怀疑，即他认为很不可思议，故选C。skeptical意为“怀疑的”。

4. A　根据题干信息词wrong定位到第十段第二句。文章提到，McGaugh第一次要求Price写下1980年到2003年之间复活节的日期时，她只用了十分钟就写下了24个日期，但错了一个，与正确的日期只差了两天，故选A。

5. B　根据题干信息词study well定位到第十二段首句。文章提到，Price很难记住诗歌或者一连串数字，这可以解释为什么她在学校成绩不突出，故答案为B。选项C的表述过于绝对，因此不能入选。

6. B　根据题干和答案信息词three subjects，abilities，personalities定位到第十三段第四句，答案一目了然，应选B。comparable results意为“结果相当，结果差不多”，而D项中的different results与之不符，故排除。

7. D　根据题干信息词neurobiological定位到倒数第四段首句和第三句。文章指出，从生物学的角度看，记忆是以大脑神经细胞连接的形式储存起来的，如果某段记忆越多地被回想起来，那么相应的连接就越持久，记忆也就越持久，故答案为D。

8. forgetting。根据题干信息词a viable memory定位到倒数第三段末句，此处答案显然应填forgetting。

9. they are tied to emotion。根据题干信息词McGaugh's research，theory定位到倒数第二段末句。文章指出，McGaugh说当记忆与情感联系在一起的时候，记忆就更具体，也更持久，故答案为they are tied to emotion。

10. the most banal and inconsequential。根据题干信息词violated可定位到原文最后一句。文章指出，McGaugh说他的理论不能解释这四位研究对象的情况，因为他们也记住了那些最平凡、最没有规律的事情，故答案为the most banal and inconsequential。