You're here: My Science Blogging » Discovery » Article: Brain Implant, a New Hope For Mind Over Matter
Yessi Pratiwi — September 13, 2007 / 10:32 pm
Here is a new hope to solve the matter over mind. Implants could one day help people who are paralyzed or unable to communicate because of spinal injury or conditions such as amyotrophic lateral sclerosis (Lou Gehrig’s disease). Electrodes implanted in the brain could, in principle, pick up neural signals and convey them to a prosthetic arm or a computer cursor. Thirty years ago brain implants showed up in X-rays the size of one centimeter. Subsequent implants shrunk to the size of a grain of rice. They were made of silicon, later still of gallium arsenide. Today they are small enough to be inserted into the neck or back, and also intravenously in different parts of the body during surgical operations, with or without the consent of the subject. It is now almost impossible to detect or remove them.
Wires threaded under the patient’s scalp and neck skin are connected to a battery pack implanted below the collarbone. The pack delivers continuous electrical current at programmed settings and can be adjusted externally by placing a controller over it.
Journal reference: (Nature: vol 442, p 164; p 195).
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