A medical apparatus for a patient includes an external system configured to transmit one or more transmission signals, each transmission signal having at least power or data. An implantable system is configured to receive the one or more transmission signals from the external system, and the external system includes a first external device with at least one external antenna configured to transmit a first transmission signal to the implantable system. The first transmission signal includes at least power or data, and an external transmitter is configured to drive the at least one external antenna. An external power supply is configured to provide power to at least the external transmitter, and an external controller is configured to control the external transmitter. A first implantable device includes at least one implantable antenna configured to receive the first transmission signal from the first external device. An implantable receiver is configured to receive the first transmission signal from the at least one implantable antenna. At least one implantable functional element is configured to interface with the patient. An implantable controller is configured to control the at least one implantable functional element. The medical apparatus is configured to neuromodulate tissue and/or record patient information.La présente invention concerne un appareil médical pour un patient qui comprend un système externe configuré pour transmettre un ou plusieurs signaux de transmission, chaque signal de transmission ayant au moins de l'énergie ou des données. Un système implantable est configuré pour recevoir le ou les signaux de transmission provenant du système externe, et le système externe comprend un premier dispositif externe avec au moins une antenne externe étant conçue pour transmettre un premier signal de transmission au système implantable. Le premier signal de transmission comprend au moins de l'énergie ou des données, et un émetteur externe est configuré pour entr
