Electromyography &
Nerve Conduction Studies
Electromyography (EMG) and Nerve Conduction Studies (NCS) are diagnostic tests that measure the peripheral nervous system. This is done by using electrodes and small needles to calculate the time it takes for electrical signals to travel up and down specific nerves and muscles. The test is used to help detect neuromuscular abnormalities such as Carpal Tunnel, ALS, and peripheral neuropathy.
Why would I need to have an EMG and NCS test?
EMG and NCS tests are commonly ordered to rule out or aid in the diagnosis of many different types of neuromuscular abnormalities, such as Carpal Tunnel, Amyotrophic Lateral Sclerosis (ALS), Peripheral neuropathy, Myositis, and other peripheral nervous system disorders.
What to expect during your EMG and NCS test
A specially trained technologist will usually begin the exam by placing sticky electrodes to specific sites on your extremities. The technologist will then stimulate the specific sites and record the data in a computer. The neurologist will then complete the needle portion of the exam if needed.
How can I prepare for my EMG and NCS test?
Arrive to your test warm and in loose clothing. You may be asked to change into a hospital gown depending on what muscles or nerves are being tested.
It is important that your hands, feet and body are warm because when you are cold it will take longer to get accurate test results.
Make sure your skin is clean and free of any oils or lotions.
What happens after my EMG and NCS test?
There may be some slight muscle soreness that persists for a day or so. Notify your doctor if you experience swelling, increasing tenderness or redness at the needle injection site.
