Neuralink’s brain chip has been implanted in a human, Elon Musk says

The first human patient has received a Neuralink brain implant, according to Elon Musk. The procedure was apparently successful, with Musk saying the individual “is recovering well” one day after the surgery.

Neuralink, which aims to create brain-computer interfaces (BCI), began recruiting human patients for its first clinical trial last fall after getting the green light from the FDA. At the time, Neuralink said that people “who have quadriplegia due to cervical spinal cord injury or amyotrophic lateral sclerosis (ALS)” may qualify for the study. “The initial goal of our BCI is to grant people the ability to control a computer cursor or keyboard using their thoughts alone,” the company wrote in a statement.

Musk didn’t share any other details about the procedure or the status of the trial. He said that “initial results show promising neuron spike detection.” Successfully implanting its device into a human patient would be a major milestone for the company, which Musk has claimed could one day enable people to experience alternate realities. The company is also facing a federal investigation for allegedly violating animal welfare laws.