One of the first British patients to receive Elon Musk's controversial brain-computer implant has described what it is like to live with the futuristic chip. He is now one of seven participants in the UK trial assessing the safety and reliability of the device in severely paralysed patients. The procedure itself was carried out by the company's R1 surgical robot, designed to insert microscopic electrodes into delicate brain tissue with extreme precision. The device connects to 1,024 electrodes implanted around four millimetres into the brain's surface in the area responsible for hand movement. While controlling a mouse via a brain implant is not entirely new - early experiments date back decades - the progress has still impressed researchers.