A flexible high density multi-channel electrode array for long-term chronic implantation

The construction of a high density multi-channel fluid potential electrode array is described. The resulting electrode array which is flat, flexible and non-irritating, is designed for long-term chronic implantation over cortical surfaces of compound curvature, as well as over restricted regions, such as the visual areas located along the medial bank of the occipital cortex. Electrophysiological data and gross anatomy obtained from animals with implantation times of up to one year are displayed.