http://www.123zcyy.com/zixun/47.htmlA Memory Drug?IT’S DIFFICULT TO IMAGINE MANY THINGS that people would welcome more than a memory-enhancing drug.____1____Furthermore,such a drug could help people remember past experiences more clearly and help us acquire new information more easily for school and at work.As scientists learn more about memory,we are closing in on this tantalizing goal.1Some of the most exciting evidence comes from research that has built on earlier findings linking LTP2and memory to identify a gene that improves memory in mice.____2____Mice bred to have extra copies of this gene showed more activity in their NMDA receptors，more LTP，and improved performance on several different memory tasks—learning a spatial layout3,recognizing familiar objects，and recalling a fear-inducing shock.If these basic insights about genes,LTP,and the synaptic basis of memory can be translated to people—and that remains to be seen—they could pave the way for memory-enhancing treatments.____3____As exciting as this may sound, it also raises troubling issues.Consider the potential educational implications of memory-enhancing drugs.If memory enhancers were available,children whoused them might be able to acquire and retain extraordinary amounts of information,allowing them to progress far more rapidly in school than they could otherwise.How well could the brain handle such an onslaught of information? What happens to children who don’t have access to the latest memory enhancers? Are they left behind in school—and as a result handicapped later in life?____4____Imagine that you are applying for a job that requires a good memory，such as a manager at a technology company or a sales position that requires remembering customers’names as well as the attributes of different products and services.Would you take a memory-enhancing drug to increase
本文来源：https://www.2haoxitong.net/k/doc/f99acf630740be1e650e9af8.html
