fullcortex.net

(1999)

I was wondering if you could tell me about a procedure called EMG. I am not even sure what the true name is.

EMG stands for either electromyography (the test) or an electromyogram (the result of the test). The test is used to augment a neurological examination. An EMG helps establish a diagnosis and the extent of a problem by measuring the electrical activity of a muscle in response to stimulation. The test also measures the nature and speed of impulse conduction along a nerve. An EMG is done by inserting electrodes in fine needles into the muscles being tested, and by placing electrodes on the skin over peripheral nerves.
An EMG may be used to evaluate a variety of problems, including the following:
• Nerve damage from compression by a disk in the neck or the back
• Nerve compression from carpal tunnel syndrome
• Neuromuscular diseases such as amyotrophic lateral sclerosis (ALS), poliomyelitis, myasthenia gravis and muscular dystrophy
• Peripheral neuropathy caused by such conditions as diabetes, pernicious anemia and heavy metal toxicity
In many instances, an EMG can provide critical diagnostic information that can not be obtained in any other way. Although there is some discomfort associated with the procedure, it is less invasive than a myelogram, which requires a spinal tap (lumbar puncture). An EMG can be done on an outpatient basis.