Abstract: A method and an implantable electrical unit are for use in effecting a direct connection between external apparatus and the nervous systems either to receive information contained in the electrical activity of selected nerve fibers or to transmit thereto information in the form of a stimulating electrical input closely approximating the natural form in order to attain appropriate neural response, in either case with a high degree of discreteness. The method and the unit provide for the regeneration of severed nerve fibers in passageways. The unit includes a member in which the passageways are formed and which is of a material that is electrically non-conductive, and biologically inert and which has electrodes incorporated in the member, each electrode exposed in an appropriate one of the passageways.