MILESTONE
The U.S. Food and Drug Administration has given Foxborough, MA-based startup Cyberkinetics the green light to begin human tests of its "brain-machine interface" device (see "Brain Power," TR April 2002). The device, a four-millimeter-square array of 100 tiny electrodes (left) that will be implanted in the brains of up to five quadriplegic people and connected by wires to a nearby computer, promises to let the patients control the computer-and associated communication tools and other aids-using only their brain signals.
METRIC
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