Electrocorticography (ECoG) is increasingly important for brain-machine interfaces, as well as long-term neural circuitry and synchronization research. ECoGs measure electrical potentials on the surface of the cerebral cortex, making ECoG well-suited for epilepsy monitoring and controlling cursory movement of neuroprosthetics. However, hemorrhage, infection, and infarction sometimes complicate conventional ECoG recordings.

University of Utah researchers have developed a biocompatible, small, flexible, thin-film polymer micro-electrocorticography array. The array is built with perforated Parylene-C, a biocompatible and highly flexible material that allows diffusion. This design facilitates the conformation of the array to the cortex surface profile and reduces the risk of immune system response.