Electromyography (EMG) & Nerve Conduction Studies (NC)
An EMG records the electrical response of specific muscles. A nerve conduction study (NC) records how fast messages travel along the nerves in the arms and legs.
About
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Both tests are usually done together with the NC being done first.
The test duration is approximately 1 hour.
Most children tolerate the procedure well, but some patients benefit from sedation to help them lay still, particularly during the EMG. See the instructions for sedation.
- The NC test is done first. Electrode stickers will be put on the wrist or ankle. Your child will feel a tingling sensation or tapping which will make the fingers or toes jump. This can feel strange, but doesn't usually hurt.
- If your doctor has requested an EMG, this will be done next.
- The tip of a very small, thin needle will be placed into the muscle and the doctor will ask your child to move in a certain way. This part of the test does not take long, but there may be some minor discomfort from the needle insertion.
- The technologist cannot give you the results of the test. The information will be analyzed and the report will be sent electronically to the referring doctor.
Preparation
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Sleep deprivation is not necessary for these tests.
Have your child wear loose-fitting clothing that can easily be pulled up over elbows and knees (a t-shirt and shorts/track pants work best).
Bring a comfort item if you feel it will help (stuffed toy, soother, blankie, etc).
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