A prosthetic coupling providing height and rotation adjustability. The trace may be a numerical value that decreases as a function of the time that has elapsed since the first trace was generated. If the sub amplifier control circuit selects a word line, a control operation is performed to activate only one side of the sub amplifiers positioned on both sides of the word line to thereby reducce the power consumed for activating the sub amplifiers. As a function of the efficiency curve in the characteristics map \u03b7=f, a further change occurs in compression ratio \u03b3 or a setting back of the change in compression ratio \u03b5. The SOG bottle is connected to SOG tube. This motion can provide direct tactile feedback to an operator of the medical device or can automatically open a switch providing electrical power to the medical device.