Science for the paralytics

In 1995, Julie Hill transformed into the first paralyzed person that stood up thanks to the 12 electrodes implanted in your dorsal spina. You could only be lifted four minutes and you were not able to walk, but the experiment was considered a victory. The challenge in this case is to reestablish the communication among the brain and the muscles that are healthy, but to losq ue the nervous message doesn't arrive. Today, you seem clear that are possible to stimulate them by means of electric small downloads.

The problem is that the muscles get tired a lot when they are stimulated and the mechanisms are not still understood with those that the brain controls and you coordinate the movement. These are abrupt and not very natural.

The most sceptical are convinced that one needs a computer with enormous calculation capacity and, at the same time, a system the heat that the same computer would generate to vanish. You are who say that, the day that settle this mechanism class, your own heat you would end up to destroy it.

But the neuter most surprising prostheses are those that seek to reestablish the sensorial feature of hearings and eyes.

the first, calls implant cocleares, you are, in the street from more than two decades. They consist on a very fine catheter, with more than 20 electrodes inserted in the interior hearing so that they stimulate the auditory ledge. The electrodes are wired to a microphone that pick up the ambient sound and a processor that it decompose it. When the electrodes receive these sounds, they respond according to the type of frequency and they stimulate the auditory ledge with more or smaller intensity. These implants settle in people to those that they don't have enough the habitual headsets. But although you are who have even been able to talk on the phone, this system little evolved is still if the 27.000 cells are compared for the hearing of each hearing with the 23 electrodes of the implants.