The company Neuralink of the tycoon Elon Musk, which specializes in creating brain implants, he admitted on Wednesday some “technical errors” after placing a brain implant in a person for the first time.

The revelation came in a post 100 days after the 29-year-old Noland Arbo received her Neuralink implant.

Arbo was paralyzed below the shoulders after a diving accident. Neuralink has developed a brain-computer interface to help paralyzed patients control external technologies with just their thoughts. The patient received the implant in January, and in March Neuralink showed Arbo playing chess online and using the implant to move the cursor.

The device is designed to record neural activity through 1,024 electrodes divided into 64 flexible leads, or “filaments,” each of which is thinner than a human hair and can be placed independently in the brain, according to Neuralink’s website.

The standard measure of cursor control speed and accuracy is bits-per-second (BPS), and higher BPS values ​​indicate better cursor control, according to the site.

However, in the weeks following surgery, some threads detached from their positions in the patient’s brain. This resulted in a reduction in the number of effective electrodes, which led to a reduction in BPS as explained by Neuralink. The company did not disclose how many threads were detached.

Despite the setback, the company was able to make some changes to address the problem. He noted that these changes produced a “rapid and sustained improvement in BPS,” which now exceeds the initial performance of Arbo’s implant.

However, Neuralink has a long way to go a long road of trials safety and efficacy before it can receive approval from the US Food and Drug Administration (FDA) to commercialize its technology.