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New Biosensor Chip Picks Up Heart Signals Remotely

The technology will also use body sensing for gaming, aiding the disabled, helping emergency responders, and switching on the lights

3 min read

1 November 2011—Medical technologists are in hot pursuit of methods for unobtrusively monitoring the body, and video-game-system makers are on the same trail: Nintendo’s Wiimote and Microsoft’s Kinect follow body movements, and products being developed by NeuroSky and Emotiv use physiological signals to control the game.

The kind of sensing NeuroSky and Emotiv are peddling is poised to become even less obtrusive with the introduction of a new technology that detects the voltage change in the body’s muscles and nerves without electrical contact. In October, Plessey Semiconductors of Roborough, England, began shipping samples of its Electric Potential Integrated Circuit (EPIC), which measures minute changes in electric fields. In videos demonstrating the technology, two sensors placed on a person’s chest delivered electrocardiogram (ECG) readings. No big deal, you say? The sensors were placed on top of the subject’s sweater, and in future iterations, the sensors could be integrated into clothes or hospital gurneys so that vital signs could be monitored continuously—without cords, awkward leads, hair-pulling sticky tape, or even the need to remove the patient’s clothes.

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This Implant Turns Brain Waves Into Words

A brain-computer interface deciphers commands intended for the vocal tract

10 min read
A man using an interface, looking at a screen with words on it.

A paralyzed man who hasn’t spoken in 15 years uses a brain-computer interface that decodes his intended speech, one word at a time.

University of California, San Francisco
Blue

A computer screen shows the question “Would you like some water?” Underneath, three dots blink, followed by words that appear, one at a time: “No I am not thirsty.”

It was brain activity that made those words materialize—the brain of a man who has not spoken for more than 15 years, ever since a stroke damaged the connection between his brain and the rest of his body, leaving him mostly paralyzed. He has used many other technologies to communicate; most recently, he used a pointer attached to his baseball cap to tap out words on a touchscreen, a method that was effective but slow. He volunteered for my research group’s clinical trial at the University of California, San Francisco in hopes of pioneering a faster method. So far, he has used the brain-to-text system only during research sessions, but he wants to help develop the technology into something that people like himself could use in their everyday lives.

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