A rotary drive system having a voltage source and an electric motor. In certain embodiments, the implantable cardiac treatment system determines the most appropriate electrode vector for continuous sensing based on which electrode vector results in the greatest signal amplitude, or some other useful metric such as signal-to-noise ratio. A plurality of apertures extend from an interior surface of the hollow cylinder to an outer surface of the hollow cylinder sides. Additionally, the method an apparatus relates to the treatment of torticollis and other abnormalities of the neck.