The result is a brain mapping device that fits much more closely to the brain (giving it better readings) and delivers higher resolution in the process. Real-world tests bear that out. While a regular device and the experimental model could both spot brain areas triggering epileptic seizures, the new device could capture more detail.

There's a lot of work to be done: the scientists want to build higher-density electrode grids and verify that this device can stay in your body for a long time without creating issues. It could be years before surgeons get their hands on a finished product. If and when they do, though, the technology could make brain surgery considerably safer. Doctors would be less likely to damage or remove healthy parts of your brain, and they could cut more aggressively than they might otherwise.