waderoush writes "A startup called Tibion in Sunnyvale, CA, has begun selling battery-powered robotic exoskeletons that help stroke victims with one-sided weakness relearn how to stand, sit, walk, and negotiate stairs. The leg isn't a permanent attachment; the company says patients who use the device for 45 minutes a week for four weeks experience significant gains in walking speed that persist and even improve months after the treatment. They believe that the $40,000 device — which includes sensors that respond to subtle signs of user intentions, such a shift in weight — provides feedback that triggers neuroplasticity, the brain's ability to rewire itself to repair damage."
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