 Elon Musk's Neuralink company could soon outfit another test case patient with its revolutionary implantable brain device. It is described as a chip which can also transmit signals outside the body to a computer interface. The device allows for a person to manipulate text, such as a computer or a smartphone, with their thoughts and brain waves. The company says its first test patient, a quadriplegic named Nolan Arbaugh, had been successfully playing video games using only his mind.