Electromyography (EMG)

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I have heard an Electromyography is important in diagnosing ALS. Can you explain it a little more?

Electromyography (EMG)

Electromyography is concerned with testing nerve impulses, the nerves, and the muscles they innervate. It is mainly completed to test the function of lower motor neurons.

During the first part of the EMG, motor and sensory nerves are tested. This first part of the test will investigate whether nerve impulses are being conducted at a normal rate.

The second part of the EMG involves a needle used as an electrode placed inside the muscles on different areas of the body. The second part of the test will be used to determine which muscles are affected.

   

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