Electromyography

by andywalsh | March 17, 2019 8:10 pm

Aprocedure that measures the electrical activity in muscles. Electromyography (EMG) can be used to investigate weakness or paralysis. Small disc electrodes are attached to skin over the muscle being tested, or fine needle electrodes may be inserted into the rouscle. Electrical impulses passing through the muscle are detected by the electrodes and converted into signals that are displayed on a screen and recorded. Changes in electrical wave patterns indicate certain muscle and nerve disorders.

EMG takes 30 to 60 minutes, depending on the number of muscles examined. The test has no adverse effects.

Electromyography is not a simple test, but a complex consultation. Because of the needle electrodes, electromyography may be somewhat painful or extremely painful to the patient, and the muscle may feel tender for a few days. This test may be used to diagnose peripheral nerve disorders, such as carpal tunnel syndrome. There are two types of Electromyography: the surface electromyography and the intramuscular electromyography. In both types of Electromyography, the electrical activity is displayed visually on an oscilloscope and may also be displayed audibly through a microphone.

Purpose

Electromyography can help diagnose many muscle and nerve disorders, including:

How to prepare for the test?

Precautions

What the risks are?

Source URL: https://alldiseases.org/electromyography/