Ifyou’ve ever had trouble finding your keys or remembering what you had for brea-组卷网

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If you’ve ever had trouble finding your keys or remembering what you had for breakfast, you know that short-term memory is far from perfect. For people who’ve had a traumatic brain injury (TBI), though, recalling (回忆) recent events or conversations can be a major struggle.

“We have patients whose family cannot leave them alone at home because they will turn on the stove and forget to turn it off,” says Dr. Ramon Diaz-Arrastia, who directs the Traumatic Brain Injury Clinical Research Center at the University of Pennsylvania. So Arrastia and a team of scientists have been testing a possible treatment. It involves delivering a pulse (脉冲) of electricity to the brain at just the right time.

And it worked in a study of eight people with moderate or severe TBIs, the team reports in the journal Brain Stimulation. A precisely timed pulse to a brain area just behind the ear improved recall by about 20 percent and reduced the person’s memory deficit (缺失) by about half.

If the results pan out in a larger study, the approach might improve the lives of many young people who survive a serious TBI, says Diaz-Arrastia, an author of the study and a professor of neurology at Penn. “In many cases, the reason they’re unable to rejoin and fully participate in society is because of their memory problems,” he says. “And they often have this disability that goes on for many, many decades.” But the treatment is not for the timid. It requests patients to have electrodes surgically implanted in their brain. And scientists are still perfecting the system that delivers the electrical pulses.

While experimental, the results offer hope for individuals with memory deficits due to traumatic brain injuries. If the technique continues to show promise, it could transform memory recall and cognitive function improvement for those who need it most.

【小题1】Why did Arrastia’s team do the research?

A．To cut the cost of treating TBI.

B．To show interest in electrical pulses.

C．To find the treatment of memory deficits.

D．To explain problems of short-term memory.

【小题2】What does the underlined phrase “pan out” in paragraph 4 mean?

A．Change.

B．Occur.

C．Differ.

D．Disappear.

【小题3】What does the author think of the treatment?

A．It is uncertain.