Precision Neuroscience claims to have set a new record for the number of neuron-tapping electrodes placed on a living human's brain at 4,096. The high density of electrodes allowed neuroscientists to map the activity of neurons at an unprecedented resolution during a surgery to remove a benign brain tumor. Precision's device sits on top of the brain and does not penetrate the brain at all. It consists of a film that contains 1,024 electrodes embedded in a lattice pattern. The device is modular, allowing for multiple films to be used at once - four devices were used during the surgery.

Competition is amping up in the brain-computer interface (BCI) space as recent advances have the field buzzing with anticipation. Precision Neuroscience is one of the startups at the forefront of the field. It has placed its device on the brains of 14 human patients so far and is hoping to at least double that number by the end of this year. The company expected to have its first BCI on the market next year. This article takes a look at the BCI space, Precision's device, how it works, future designs, and more.