A medical apparatus for a patient, the medical apparatus comprising: an external system configured to transmit one or more transmission signals, each transmission signal comprising at least power or data; and an implantable system configured to receive the one or more transmission signals from the external system, wherein the external system comprises a first external device comprising: at least one external antenna configured to transmit a first transmission signal to the implantable system, the first transmission signal comprising at least power or data; an external transmitter configured to drive the at least one external antenna; an external power supply configured to provide power to at least the external transmitter; and an external controller configured to control the external transmitter; and wherein the implantable system comprises a first implantable device comprising: at least one implantable antenna configured to receive the first transmission signal from the first external device; an implantable receiver configured to receive the first transmission signal from the at least one implantable antenna; at least one implantable functional element configured to interface with the patient; an implantable controller configured to control the at least one implantable functional element; an implantable energy storage assembly configured to provide power to an element selected from the group consisting of: the at least one implantable functional element, the implantable controller, the implantable receiver, and combinations thereof; and an implantable housing surrounding at least the implantable controller and the implantable receiver, wherein the at least one functional element is configured to deliver electrical energy at high frequencies at or above 1kHz to treat pain of the patient and to deliver electrical energy at low frequencies below 1kHz to stimulate motor nerve tissue, and wherein the implantable controller is configured to produce a stimulation signal comprising a mix and/or modulation of the low frequency and high frequency signals. an external system configured to transmit one or more transmission signals, each transmission signal comprising at least power or data; and an implantable system configured to receive the one or more transmission signals from the external system, wherein the external system comprises a first external device comprising: at least one external antenna configured to transmit a first transmission signal to the implantable system, the first transmission signal comprising at least power or data; an external transmitter configured to drive the at least one external antenna; an external power supply configured to provide power to at least the external transmitter; and an external controller configured to control the external transmitter; and at least one external antenna configured to transmit a first transmission signal to the implantable system, the first transmission signal comprising at least power or data; an external transmitter configured to drive the at least one external antenna; an external power supply configured to provide power to at least the external transmitter; and an external controller configured to control the external transmitter; and wherein the implantable system comprises a first implantable device comprising: at least one implantable antenna configured to receive the first transmission signal from the first external device; an implantable receiver configured to receive the first transmission signal from the at least one implantable antenna; at least one implantable functional element configured to interface with the patient; an implantable controller configured to control the at least one implantable functional element; an implantable energy storage assembly configured to provide power to an element selected from the group consisting of: the at least one implantable functional element, the implantable controller, the implantable receiver, and combinations thereof; and an implantable housing surrounding at least the implantable controller and the implantable receiver, at least one implantable antenna configured to receive the first transmission signal from the first external device; an implantable receiver configured to receive the first transmission signal from the at least one implantable antenna; at least one implantable functional element configured to interface with the patient; an implantable controller configured to control the at least one implantable functional element; an implantable energy storage assembly configured to provide power to an element selected from the group consisting of: the at least one implantable functional element, the implantable controller, the implantable receiver, and combinations thereof; and an implantable housing surrounding at least the implantable controller and the implantable receiver, wherein the at least one functional element is configured to deliver electrical energy at high frequencies at or above 1kHz to treat pain of the patient and to deliver electrical energy at low frequencies below 1kHz to stimulate motor nerve tissue, and wherein the implantable controller is configured to produce a stimulation signal comprising a mix and/or modulation of the low frequency and high frequency signals.