Elon Musk’s brain-chip company, Neuralink, is recruiting worldwide participants for its device that allows control of a computer using thoughts.Neuralink is specifically targeting quadriplegics to participate in the clinical trial for their brain implant technology.The trial, known as the PRIME study, has already enrolled three quadriplegics, who are testing the brain implant to control a computer or smartphone.Noland Arbaugh, the first Neuralink patient, reported no negative side effects after a year and is now using the brain implant for various activities.