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MPG or mpg may refer to: . 1 mpg, one of a number of file extensions for MPEG-1 or MPEG-2 audio and video compression. 2  General Motors Milford Proving Ground. 3  Media Planning Group, former name of Havas Media, a media division of Havas.4  MPG (gene) , a human gene.5  M.P.G. , a 1969 album by Marvin Gaye. .mpg, one of a number of file extensions for MPEG-1 or MPEG-2 audio and video compression. 2  General Motors Milford Proving Ground. 3  Media Planning Group, former name of Havas Media, a media division of Havas. 4  MPG (gene) , a human gene.
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.