This man with ALS is “the first power user” of a brain implant that lets him speak

**TL;DR:** This man with ALS is “the first power user” of a brain implant that lets him speak

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First long-term "power user" of a speech implant: Casey Harrell, paralyzed by ALS, has logged over 3,800 hours using a brain-computer interface at home — far beyond what any previous user has achieved — communicating with 99% accuracy across a 125,000-word vocabulary. Growing independence changes everything: Early on, researchers had to physically connect Harrell to the device themselves. Now his care partner handles it, meaning he wakes up, gets plugged in, and simply gets on with his day.

More than communication: Harrell uses the implant to surf the web, send emails, and continue his career as an environmental activist — and a profanity filter lets him read bedtime stories to his seven-year-old daughter. The holy grail, with caveats: Experts call long-term, independent BCI use a landmark achievement, but warn results may vary — brain degeneration, scar tissue, and many patients' reluctance to undergo invasive surgery remain real obstacles to wider adoption.

" data-chronoton-post-id="1138953" data-chronoton-expand-collapse="1" data-chronoton-analytics-enabled="1"> Casey Harrell has had a set of electrodes embedded in his brain for almost three years. Harrell, who has amyotrop

Source: MIT Tech Review

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Last updated: June 16, 2026.

Additional context: early-cycle stories often look bigger in headlines than in day-to-day impact. The useful move is to identify the smallest set of facts that would change your decision, then wait for those facts to land.

Additional context: early-cycle stories often look bigger in headlines than in day-to-day impact. The useful move is to identify the smallest set of facts that would change your decision, then wait for those facts to land.