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What are the scientists at the University of California doing to help patients blink?
What are the scientists at the University of California doing to help patients blink?
admin
2012-12-01
66
问题
What are the scientists at the University of California doing to help patients blink?
Most of us blink without thinking. But people who have sustained strokes or combat injuries can lose their ability to blink, which is important for lubricating and cleaning the eye. Surgery is an option—a small piece of muscle transplanted from the leg can sometimes work. But the operation takes 10 hours and has its own dangers. So scientists at the University of California, Davis, Medical Center are developing artificial muscles to help patients blink again.
The blink system starts with what researchers call an eyelid sling, a small piece of muscle or fabric that holds the eyelid. The sling attaches to bone around the eye. It’s then linked to an electrostatic polymer- basically a piece of flexible plastic that expands or contracts via voltage change. A tiny battery hidden in a natural hollow in the temple powers the polymer. Electrical current keeps the muscles contracted and the eyes open. Kill the current and the lid closes.
Here’s the creepy part—the mechanism’s been tested on cadavers, which are blinking away. But now that the principle is proven, in the next years real patients could be on the brink of a blink.
选项
A、They are transplanting a piece of muscle from the leg to the eye.
B、They are doing surgeries on the eye to help patients blink.
C、They are doing tests of a new blink system on real patients.
D、They are developing artificial muscles to help patients blink.
答案
D
解析
细节题。根据新闻中“So scientists at the University of California,Davis,Medical Center are developing artificial muscles to help patients blink again.”可知科学家开发了一种人工肌肉系统帮助失去眨眼功能的病人重新恢复这项功能。因此答案为D。
转载请注明原文地址:https://kaotiyun.com/show/jWaO777K
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