What is surface electromyography (SEMG)?
SEMG is the study of muscle status (activity) using surface electrodes, as opposed to invasive needle EMG which only measures a single muscle fiber. SEMG picks up tiny signals coming through the skin that are representative of the average of multiple fibers of a given muscle. The data is obtained through surface electrodes much like EKG electrodes, amplified, and sent to the computer where it is displayed. The Myotronics system permits study of up to eight channels of SEMG simultaneously.
