文章较难，大家听写填空即可~
On October 9th, we reported that cats born deaf develop enhanced vision. Now researchers find that blind people perceive touch faster than do those with sight. The work is in the Journal of Neuroscience.
Volunteers who were sighted or who had ____1____ of vision loss were asked to sense the movements of a small probe tapped against the tips of their ____2____. Everyone did well distinguishing light taps from stronger taps.
But when a light tap was followed almost instantly by a big, long-lasting vibration, those who had been blind since birth perceived each touch much better than did the sighted volunteers or those with only partial vision loss.
The researchers also varied the period between the tap and the vibration, and then measured the minimum separation time needed for participants to perceive the two separately. And ____3____ blind people needed less time than anyone else. They were also the fastest Braille readers in the group.
The study suggests that the brain adapts to early blindness with a faster ____4____. But the researchers admit that a lifetime of practicing Braille could also ____5____.
varying levels index fingers congenitally perception of touch get the credit
我们在10月9日发表了失聪的小猫视力更好的报道，而现在研究人员则发现盲人的触觉感知比有视力的人更敏锐。这项研究刊登在《神经科学》杂志上。 自愿参与实验的人有的视力正常，有的则有不同程度的视力缺陷，他们被要求去感知一根敲击他们食指的探针如何运动。每个人都能清楚分辨出较重击之中夹杂着的轻击。 但若在轻击之后马上紧接一阵持久强烈的震动，与视力正常和有部分视力丧失的人相比，那些先天失明者能更清晰地感知每次不同的运动。 研究人员也尝试改变敲击和震动之间的时间间隔，然后测量让参与者分辨出两次不同运动的最小所需间隔时间。先天失明者比其他人所需的间隔时间更少，而且在测试队伍里他们阅读布莱叶文的速度是最快的。 研究表明大脑为了适应了早期失明会发展更加敏锐的触感。但研究人员承认盲人一生中不断练习阅读布莱叶文这个情况可能影响了实验结果。