2026-09-30 00:00 Media Coverage Communication & Language Source language EN

Single ECoG Implant Lets Paralyzed Participants Speak and Gesture Through an Avatar

Summary A research team has used a single high-density electrocorticography (ECoG) implant, an electrode array placed on the brain's surface, to decode speech and gestures simultaneously in people with paralysis, ApplySci reported. When participants simply attempted to speak or gesture, a personalized virtual avatar spoke or moved accordingly, either both at once or separately. The researchers expected the brain signals during combined expression to be a simple sum of the two, but the data differed clearly from speech or gestures alone. Participants practiced a limited vocabulary of up to 10 gestures and 10 words or phrases.

Why it matters Most speech-decoding work restores talking alone; reading speech and gesture from one implant moves closer to natural communication, though the non-additive signals mean decoders must be trained on combined actions. The current standard, eye tracking, is slow, restrictive and physically tiring, the report noted, so even a small vocabulary points to room for improvement.

BCIwiki (bciwiki.com) — A single high-density electrocorticography (ECoG) implant can support simultaneous decoding of speech and gestures in people with paralysis, a research team has shown, according to ApplySci. Participants controlled a personalized virtual avatar by attempting speech and gestures together or separately.

The researchers had expected the combined signal to be the speech and gesture patterns added together. Instead, brain activity during simultaneous expression looked very different from the signals for speech or gestures alone.

Participants practiced up to 10 gestures and 10 words or phrases. ApplySci noted that eye-tracking, the current standard of care, is slow, limited in expression and physically exhausting, so even a small vocabulary points toward a better option.

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applysci.com 2026-09-30

Invasive BCI ECoG Speech Decoding

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