Elon Musk's Neuralink plans to implant its brain-computer interface (BCI) into a second human patient within the next week, following the initial implantation in January. The company aims to have 'high single digits' of patients by the end of the year. Neuralink is addressing issues from the first implant, such as electrode threads retracting from brain tissue, by improving the surgical procedure and device design. The technology aims to help paralyzed patients control digital devices using their thoughts and mitigate AI-related risks by fostering closer human-digital intelligence symbiosis. Despite challenges, the initial patient, Noland Arbaugh, has experienced stable device performance, allowing him to interact with digital devices through thought alone.