Since the Neuralink launch event last year, Musk and Neuralink have published one scientific paper, in the Journal of Medical Internet Research, in October. The paper described the development of their robotic device, an arm able to delicately insert hundreds of thin threads, about a tenth of the width of a human hair, into the brain. It’s sometimes dubbed the “sewing machine” and is capable of inserting around six threads per minute, each one composed of flexible plastics and featuring 192 electrodes.

The company’s early research focused on interfacing with the rodent brain. In the October paper, Musk and Neuralink detailed two Neuralink systems, A and B, tested on rats. The former can insert more than 1,500 electrodes and the latter, 3,000. The paper describes a free-moving rat attached to system B, with a USB-C slot sticking out of its head, but there’s no clear indication of Neuralink having settled on the best place for electrodes.

The report also details accelerated schedules, noting that the drive to advance generation has led to errors in animal experiments. One former worker said Thatink had switched from rodent experiments to primates faster than expected in medical science.