Described herein are systems and methods for deploying and recording electrophysiologic signals from electrode arrays located within the dura mater of the brain. The dura matter includes layers of connective tissue, or membrane, that surround the brain and spinal cord. The present disclosure relates to an endovascular electrode system deployed within the blood vessels located between layers of the dura mater, including, for example, the middle meningeal artery and its branches.
