Neuralink last reported in 2019, that it had a sewing machine-like device capable of implanting thousands of 4 to 6 micron in wide threads into the brain. They demonstrated reading information from a lab rat using 1,500 electrodes and anticipated to start experiments with humans in 2020.

Brain-machine interfaces (BMIs) should restore sensory and motor function and the treatment of neurological disorders. Neuralink is progressing to a scalable high-bandwidth BMI system. The 2019 system has arrays of small and flexible electrode threads which can scale to 3,072 electrodes per array distributed across 96 threads. There is a neurosurgical robot capable of inserting six threads (192 electrodes) per minute.