Neuralink, a brain-computer interface (BCI) company conducting the world's first research on implanting computer chips into the human brain, has reportedly encountered issues during its experiments.
On the 8th (local time), The Wall Street Journal (WSJ) reported that multiple threads connected to the brain from the chip (implant) implanted in the skull of the first experimental subject, quadriplegic patient Noland Arbo, had come loose, resulting in a decrease in the amount of data that could be collected from the brain.
The implant, about the size of a 25-cent coin, contains a data processing chip, battery, communication devices, and is attached to 64 threads each with 16 electrodes. It communicates with neurons through these fine thread-like electrodes.
According to WSJ, several threads detached from Arbo's brain a few weeks after the implantation surgery, reducing the number of effective electrodes connected. This led to a decrease in the bits per second (BPS) rate, which measures the speed and accuracy of Arbo's ability to control computer cursors and other devices using only his thoughts.
In response, Neuralink stated, "We have modified the recording algorithm to be more sensitive to neurons," and added, "As a result, the BPS has increased and now surpasses Noland's initial performance."
Neuralink, a startup founded in 2016 by Elon Musk, CEO of Tesla, implanted Arbo with a device last May, eight months after receiving approval from the U.S. Food and Drug Administration (FDA), enabling control of various devices such as computers and mobile phones using only thoughts.
WSJ cited a source familiar with the matter, suggesting that the cause of the threads detaching from Arbo's brain might be pneumocephalus, a condition where air enters the skull. Although it does not pose a significant risk to patient safety, it was reportedly discussed internally at Neuralink to possibly remove the implant from the patient's brain.
Neuralink officials consider the issue resolved and have communicated this to the FDA, WSJ explained. However, Eric Leuthardt, a professor at Washington University School of Medicine, told Bloomberg News, "Because the threads connect to a device inside the skull rather than on the surface of brain tissue, complications can occur," and expressed concerns that "even nodding or sudden movements can cause disturbances."
Neuralink also posted online a video showing Arbo quickly manipulating a cursor to play chess. Additionally, on the 4th, Arbo uploaded videos on his X (formerly Twitter) account demonstrating navigating computer screens and playing games.
Neuralink aims to implant devices in 10 people this year. Bloomberg News predicted that malfunctions of Neuralink implants could delay FDA approval for further experimental procedures.
© The Asia Business Daily(www.asiae.co.kr). All rights reserved.
