2010年12月英语六级听力练习二十三

Then, they were given tests to evaluate their skill with numbers, using a set of made-up symbols instead of actual numbers. Some people who got the electric stimulation ______________________________.Others were significantly worse, depending on how the current was applied.  

Cohen Kadosh says the electric current apparently affects brain chemistry in a way that______________________________, a feature called plasticity. "This is what we want eventually to do in these cases, where people have some problems to learn correctly". 

This kind of stimulation may affect more than just numerical skill. Cohen Kadosh says other researchers are studying how it might be used to alleviate pain, or help restore speech after a stroke, to name just 2.

This is still just a laboratory finding, but ______________________________, persisting for at least 6 months. Cohen Kadosh and his team are patenting the process and he says electric brain stimulation might one day be used to restore abilities lost through illness or may be just help a prospective engineering student improve her math skills.