Electromyography
Electromyography (pronunciation: /ɪˌlɛktroʊmaɪˈɒɡrəfi/; etymology: from Greek electro- meaning "electric", myo- meaning "muscle", and -graphy meaning "to write") is a diagnostic procedure that assesses the health of muscles and the nerve cells that control them (motor neurons).
Overview
Electromyography translates these signals into graphs, sounds or numerical values that a specialist interprets. The procedure involves inserting a needle electrode through the skin into the muscle. The electrical activity detected by this electrode is displayed on an oscilloscope, and may be heard through a speaker.
Procedure
During an EMG, a needle electrode inserted directly into a muscle records the electrical activity in that muscle. A nerve conduction velocity (NCV) test, another part of an EMG, uses electrode stickers applied to the skin (surface electrodes) to measure the speed and strength of signals traveling between two or more points.
Uses
Electromyography is used to diagnose different diseases such as Amyotrophic lateral sclerosis (ALS), Myasthenia gravis, and Peripheral neuropathy. It can also be used in research to study neuromuscular physiology.
Risks
The risks associated with Electromyography are minimal, but may include slight bleeding at the needle insertion sites and in rare cases, infection.
See Also
External links
- Medical encyclopedia article on Electromyography
- Wikipedia's article - Electromyography
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