A nervous system interface device can include a flexible active layer, a power coil, a communication module, and an antenna. More specifically, the flexible active layer can included a plurality of electrodes that are positioned to take neural measurements of the nervous system. The power coil can be electrically coupled to the flexible active layer and can be configured to receive wireless power from a power transfer device. The communication module can be electrically coupled to the flexible active layer and can be configured to receive power from the power coil. The antenna can also be adapted to wirelessly communicate neural measurement information to another device (e.g. an external computing device, receiver or the like). The nervous system interface device has two functional configurations which include a rolled and an unrolled configuration. In the rolled configuration the nervous system electrode device is rolled along a longitudinal axis for insertion into a hypodermic needle. In the unrolled configuration the nervous system electrode device is substantially flat. These nervous system electrode devices can dramatically improve access to brain function information, increase brain-machine interface functionality, and decrease foreign body response.
