Freebase(0.00 / 0 votes)Rate this definition: Sponson. Sponsons are projections from the sides of a watercraft, for protection, stability, or the mounting of equipment such as armaments or lifeboats, etc. They extend a hull dimension at or below the waterline and serve to increase flotation or add lift when underway.
ECG (electrocardiogram) and high blood pressure. 1  An electrocardiogram (ECG) is a test which measures the electrical activity of your heart to show whether or not it is working normally. 2  An ECG records the heartâs rhythm and activity on a moving strip of paper or a line on a screen.
An EMG is the summation of action potentials from the muscle fibers under the electrodes placed on the skin. The more muscles that fire, the greater the amount of action potentials recorded and the greater the EMG reading. EMG recording: The EMG is recorded by using a electrode placed on the muscle. The electrical activity measured by each muscle electrode and the ground electrode are sent to an amplifier. The amplifier eliminates random voltages caused by electrical noise by subtracting the signal from the ground electrode from the muscle electrode, producing the raw EMG.