Neuralink has successfully implanted in a second patient its device designed to give paralyzed patients the ability to use digital devices by thinking alone, according to the startup"s owner Elon Musk, writes Reuters.

Neuralink is in the process of testing its device, which is intended to help people with spinal cord injuries. The device has allowed the first patient to play video games, browse the internet, post on social media and move a cursor on his laptop.

Musk, in comments made during a podcast released late on Friday that ran more than 8 hours, gave few details about the 2nd participant beyond saying the person had a spinal cord injury similar to the 1st patient, who was paralyzed in a diving accident. Musk said 400 of the implant’s electrodes on the 2nd patient’s brain are working. Neuralink on its website states that its implant uses 1,024 electrodes: “I don’t want to jinx it but it seems to have gone extremely well with the second implant. There’s a lot of signal, a lot of electrodes. It’s working very well”.

Musk did not disclose when Neuralink performed the 2nd patient’s surgery. Musk said he expects Neuralink to provide the implants to 8 more patients this year as part of its clinical trials. The 1st patient, Noland Arbaugh, was also interviewed on the podcast, along with 3 Neuralink executives, who gave details about how the implant and the robot-led surgery work.

Before Arbaugh received his implant in January, he used a computer by employing a stick in his mouth to tap the screen of a tablet device. Arbaugh said with the implant he now can merely think about what he wants to happen on the computer screen, and the device makes it happen. He said the device has given him a modicum of independence and reduced his reliance on caregivers.