If that is your goal, then you would be in great trouble. You would be using your brain to perform a job that is not actually your job, like deciding what will happen after an accident. That, obviously, can’t be done through your brain. That is why they need to implant the electrodes in the brain.”
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One such electrode is being developed by Dr. Rene Guenet, a neuroscientist at the École Polytechnique Fédérale de Lausanne . Until recently, when scientists discovered how a person’s nervous system is structured, they had no idea what was really going on.
A group of scientists — including Guenet and Dr. Mark W. Siegel, of the University of Illinois, who is now an adviser to the United States Department of Transportation — have been trying to understand what happens when the sensory input is changed, by inserting electrodes. These are electrodes that can be placed on the scalp, under the skin. They are designed to be placed near particular areas of the head that are normally not connected to the nerves involved in the action being performed. If a person makes a choice, like choosing a foot over a hat, the signal will travel through the scalp to the brain through the nerve fibers that carry input to the fingers. But if the person is asked to choose between two things: one is a good foot and the other is a bad foot, the signal does not go directly to the brain. Instead, the message goes out through the nervous system in the fingers, where it is interpreted by the brain. This sort of connection goes on within and behind the surface of the brain. In other words, if your mind is telling you that the bad foot is worse, then there is an input to the brain from the brain in the hands — which would make for a bad decision, if you were the one making that decision. So Guenet is trying to get his brain into the loop, in order to understand what is going on.
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Guenet’s device has several advantages over current ones. The electrodes, which weigh a few grams, are embedded on the scalp; they are not on the earlobes of the head. In addition, they can be placed under the skin without touching the skin, so they do not have to be removed afterward. The electrodes also do not get in the way of an active imagination or of doing mental calculations.
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