This Man with ALS is the First Power User of a Brain Implant That Lets Him Speak
Summary
MIT Technology Review reported on Casey Harrell, an ALS patient who has become the first power user of a speech brain-computer interface, using his implant for more than 3,800 hours at home over 22.6 months without researchers present. Harrell, who is paralyzed, can use the device largely independently to speak sentences, surf the web, and perform his job. The UC Davis BrainGate team's work was published in Nature Medicine.
Why it matters
This case study represents a watershed moment for BCI technology transitioning from short laboratory demonstrations to sustained real-world use. The thousands of hours of independent home use demonstrate that speech BCIs can become practical, reliable tools for people with severe motor impairment, fundamentally changing expectations about what neural interfaces can deliver outside controlled research settings.
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