Elon Musk says his company Neuralink has placed an experimental brain device in a person in the first human test of the technology.Neuralink describes the coin-sized device as a “brain-computer interface.” It is designed to be implanted inside the brain through a medical operation.Musk announced the news on the social media service he owns, X. The billionaire businessman is also the owner of Tesla and SpaceX. His company Neuralink aims to establish direct communication links between the brain and computers.“The first human received an implant from @Neuralink (Sunday) and is recovering well,” Musk wrote. He added that first results of the implanted device showed “promising neuron spike” activity.A spike is a term for a method neurons use to communicate with each other. The Cambridge Learner’s Dictionary defines a neuron as “a nerve cell that carries messages between your brain and other parts of your body.”The device includes an extremely small computer and extremely thin wires that connect to a part of the brain that controls intent of movement.Neuralink says the implant is designed to treat brain disorders and help serious back injury victims regain body movement. Company officials also say it might be used one day to help blind people see again.