Elon Musk's startup Neuralink streamed a live video on Wednesday that showed a patient using the company's brain implant to move a mouse and play chess on a computer. A BCI is a system that deciphers brain signals and translates them into commands for external technologies. Dr. Nader Pouratian, chair of the Department of Neurological Surgery at UT Southwestern Medical Center, said researchers have been developing and studying BCI technology for years. It is not clear how many patients are participating in Neuralink's trial, or what the trial is trying to demonstrate. There is reason to be hopeful about Neuralink's technology, said Dr. Marco Baptista, chief scientific officer of the Christopher & Dana Reeve Foundation, which provides resources to people who have become paralyzed.

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Persons: Elon, Noland Arbaugh, Musk, Arbaugh, there's, Neuralink, Nader Pouratian, we've, Pouratian, Marco Baptista, Christopher, Dana Reeve, " Baptista Organizations: BCI, Blackrock, Neuroscience, SpaceX, Department of Neurological, UT Southwestern Medical Center, CNBC, U.S . Food, Drug Administration, Dana Reeve Foundation, PubMed Locations: Brussels, Belgium, Synchron, U.S, Neuralink