Neuralink just pulled off something neurosurgeons have long considered impractical. The company successfully inserted its ultra-thin electrode threads directly through the dura mater, the tough protective membrane surrounding the brain, without cutting it open first.
Think of the dura as the brain’s bouncer. It’s a dense, leathery layer that shields the most important organ you’ve got. Traditionally, implanting anything into the brain means slicing through this membrane, a procedure called a durectomy, which introduces infection risk and extends recovery time. Neuralink’s approach skips that step entirely.
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The electrode threads Neuralink uses are thinner than a human hair. The dura mater, by contrast, is more than 10 times thicker. Neuralink’s robotic implantation system handles this with a precision needle that pushes polyimide-based electrode threads through the intact dura and into the cerebral cortex. The robot is designed to do this while actively avoiding blood vessels.
The threads connect to Neuralink’s N1 implant, a coin-sized device that sits flush against the skull and contains roughly 1,000 or more electrodes spread across multiple threads.
