An EMG test is an electromyogram that measures electricity in the muscles during the resting state and during use. It's a tool to learn the speed at which currents are being sent through the nerves, and how quickly the muscles react. These tests help to diagnose certain types of diseases that affect muscles, nerves and connections in between the two by determining whether the flow of currents is weakened.
Preparation
During the test, the skin is washed where the test is to be preformed, and a needle is inserted into the muscle being tested. The needle is part of an electrode, and wires connect it to a machine that registers the results. Electrical signals are sent to the machine while the muscle is resting, and then while in movement so that doctors can look at the difference to see if there are any issues. The needle itself causes a small amount of pain when placed into the muscle but doesn't normally hurt during the test. Soreness many occur afterward.
Affects
There are no after-effects of an EMG test. Muscles that are tested might be a little sore for awhile due to the needle injection, but the muscles are not damaged. No muscle spasms or other conditions develop as a direct result of the test, and the patient can resume a normal life unless the doctor finds something wrong in the readings.
