Earlier this year, Elon Musk announced that the first human patient had received a Neuralink brain implant as part of the company's first clinical trial. Now, the company has shared a brief public demo of the brain-computer interface (BCI) in action. The company briefly live streamed a demo on X with a 29-year-old man named Nolan Arbaugh, who said he was paralyzed from the neck down after a diving accident eight years ago. In the video, Arbaugh explains that after receiving the implant -- he said the surgery was "super easy" -- he had to learn how to differentiate "imagined movement versus attempted movement" in order to learn to control a cursor on a screen. "A lot of what we started out with was attempting to move," Arbaugh said.