There are two types of EMG like Intramuscular EMG and surface EMG (SEMG). The intramuscular EMG (the type more commonly used) is involved to thread an electrode of the needle in the skin in the muscle of which the activity electrical worker it must be measured. Surface EMG (SEMG) is involved to arrange the electrodes on the skin that covers the muscle in order to find the activity electrical worker of the muscle. The intramuscular EMG is "the classic" shape of the EMG.
A needle is slipped into the skin in the muscle. The activity electrical worker is found from this needle. The activity is visualized visually on an oscilloscope and can also be visualized intelligible through skeletal muscles of microphone. Since is often large, several electrodes of the needle can need of being disposed to the several positions in order to obtain an informative EMG. After the disposition of the electrode(s), the patient can be asked to contract the muscle. The presence, the format and the figure of the shape of the wave produced on the oscilloscope supply the information on the ability to the muscle to answer to nervous stimulus.
