Electromyography (EMG) Testing

I had this test done the other day on my right arm and right leg.  It is usually called an EMG or Electromyography test.  There are two parts to the test.  One part of it is with a needle and the other part is a Nerve Conduction Studies test.  It is with a handheld device that gives off electrical impulses.  It feels like a buzzer so it dosnt really hurt.  The needle didnt really hurt either, not any different than getting your blood drawn.  The needle has a microscopic electrode that picks up electrical signals that could be normal or abnormal given off by the muscle.  Im not sure if the test came out as normal or not but it made like a crackling sound when she put it in the different muscles.  The Nerve Conduction Studies test uses small electrical impulses to see how the muscles react.  I know that depending on the sound the needle test makes and the timing of the impulses,  it can point to certain muscle diseases like Muscular Dystrophy.  It could also be used to see how bad nerve damage is from an injury like a slipped disc pressing on the spinal cord.  There are many other nerve problems and diseases that the test is used to help diagnose.  It is often used when patients show symptoms of weakness and impaired muscle strength.  The test helps tell the difference between muscle weakness caused injury to the nerve attached to the muscle.  It is also used so it can tell if it is a neurologic or muscle disorder.  These articles I found explain more about what diseases and problems the EMG is used to test for....I also included some pages from The Muscular Dystrophy Association (mda.org).  It has a lot of  good information about the many different forms of Muscular Dystrophy (MD).  I had never known before I started looking into muscle diseases that there were so many different forms of MD.  Some forms dont affect a person until they are older, sometimes late childhood or teens, sometimes early or late adulthood....
http://www.hss.edu/conditions_patients-guide-emg-testing.asp

http://www.nlm.nih.gov/medlineplus/ency/article/003929.htm

http://www.mda.org/publications/fa-raremd.html

http://www.mda.org/publications/fa-mmd-qa.html

http://www.mda.org/publications/fa-md-qa.html