在雅思考试中很多同学会做不完阅读题目，因为种种原因长期在六分上下徘徊。出国留学网雅思栏目为大家带来雅思阅读之阿尔茨海默的希望之光，希望能帮到大家!
本文含大量自然科学类阅读高频词，另外标注了一些初级生理学词汇最好看到要认识，这些词汇属于以前雅思不要求但在近两年改革趋势中加重的单词，同时也是托福高频单词。
Using a standard lab test of memory, a mouse was placed in a box and given a small electrical shock to its feet. Normal mice remember this and freeze in fear if put back in the box the following day, but mice with Alzheimer’s scamper about unfazed. Yet when the researchers stimulated the dentate gyrus of these mice with blue light, they also froze, suggesting that they were now able to recall the original shock.
用一个标准的实验室记忆测试，一只老鼠被放在盒子里面并对它的脚给予微小电击。如果接下来几天把它放进盒子里，正常老鼠会记住并且由于害怕而呆住不动，阿尔茨海默症老鼠则不受影响活蹦乱跳。但当研究人员用蓝光刺激这些老鼠的齿状回时，它们一样会呆住不动，这表明它们能回忆起最初的电击感受。
【经典句式】
standard 标准的
electrical shock电击
Alzheimer’s阿尔茨海默症
stimulate刺激
recall回忆
original最初的
Holdingon to a fearful memory in the long term,however, requires the brain to strengthen the nerve connections (synapses) that link memory of the box to experience of the shock. This process, known as long-term potentiation, goes awry in the brains of Alzheimer’s patients. Consistent with this idea,the Alzheimer’s mice did not freeze when placed in the box but only when their neurons were illuminated.
可是要长期保持住害怕记忆，要求大脑加强神经联系(突触)来连结盒子里的电击实验的记忆。这个过程，叫做长时程增强，没能在阿尔茨海默症老鼠大脑里顺利进行。和这一致的是，把阿尔茨海默症老鼠放在盒子里，仅仅照射神经元，老鼠并没有呆住不动。
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