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舌头:帮助盲人看世界美国威斯康星大学的研究人员保罗前不久研制出一种“舌头显示系统”。实验中,研究人员将一位健康人蒙上双眼,在其嘴中放入一种扁平状的接触器,让其用舌头抵住。研究员通过特殊电流将物体影像的电子信号传递给舌头,几分钟后,舌头神经将信号传递给大脑,“盲人”就可以看见摆在面前的各种字母了。舌头之所以能胜任传递员的工作,是因为舌头上分布着大量触觉细胞,对电子刺激极为敏感,而且舌头分泌的唾液使极低的电压就可实现电流的顺利传导。
Tongue: Helping blind people see the world Paul, a researcher at the University of Wisconsin, recently developed a “tongue display system.” In the experiment, the researchers blindfolded a healthy person and placed a flat contactor in his mouth to hold it against his tongue. The researcher passes the electronic signal of the object image to the tongue through a special current. A few minutes later, the tongue nerve will send the signal to the brain. The “blind person” can see the various letters placed in front of him. The ability of the tongue to perform as a transmitter is due to the fact that a large number of tactile cells are distributed on the tongue, which is extremely sensitive to electronic stimuli, and that the saliva produced by the tongue allows a very low voltage to conduct the current smoothly.