For the first time ever, a paralyzed man has regained the ability to use his arms thanks to an experimental technology. The man had electrical implants placed in the motor cortex of his brain and sensors inserted in his forearm, which allows the muscles of his arm and hand to be stimulated in response to signals from his brain, decoded by a computer. After eight years of working with the technology, the man is able to drink and feed himself without assistance. The redevelopment process is relatively slow, but the scientists behind the breakthrough say the proof of concept will help streamline the technology until it becomes a routine treatment for people with paralysis.