A neurotrophic electrode system includes a non-conductive cone, a multi-channel electrode assembly, a dielectric ribbon and a neurite-attracting substance disposed within the cone. The non-conductive cone consists essentially of a material that is stable in a neural environment and defines a cavity. The cavity opens to a small opening at a first end of the cone and opens to a large opening at a second end of the cone that is opposite the first end. The multi-channel electrode assembly includes at least two recording sites that are disposed within the cavity defined by the cone. Each recording site is coupled to a wire that extends out of the large end of the cone. Each wire ends in a connection pad. The dielectric ribbon encases all of the wires but exposes each recording site and exposes each connection pad.
Neurotrophic electrode system