NCS / EMG Test

The Roald Dahl Neurophysiology Department

Information for parents and carers

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What are NCS / EMG Tests?

NCS stands for ‘Nerve Conduction Studies’ and investigates how the nerves in the arms and legs are working.

EMG stands for ‘Electromyography’ and is a test that records activity from muscles.
Together these tests are used to investigate a number of different muscle and nerve problems.

They help the Consultant in the diagnosis and management of your child’s complaint or condition.

Please tell the doctor before the test if your child has:

A heart pace maker
A vagal nerve stimulator
Is on anti-coagulant medication e.g. Warfarin / Heparin

Is there anything I need to do to prepare my child for the test?

Please continue to give your child their medication.
Your child can also eat and drink as normal before the tests.
Please do not allow your child to apply cream / lotion on the skin after their last shower /
bath prior to the appointment.

What will happen during the test?

Each case is treated on an individual basis, as not all cases require both NCS and EMG.

NCS: Sticky electrodes are placed on the arm or leg and a small number of electrical pulses are given to the skin and measurements taken. Most children do not describe this as painful but as a pulsing or tingling feeling. Many just describe it as a funny feeling.

Image depicting electrodes on child's hand

Photograph of electrodes on patients arm and hand

EMG A fine needle is inserted into a muscle and readings are taken. To ease any possible pain from the needle being inserted, a local anaesthetic cream can be applied to the surface of the skin beforehand.

No blood is taken through the needle and nothing is injected. Two to three muscles may
need to be examined (occasionally more) and the doctor will discuss this with you before
the test. The Roald Dahl Neurophysiology Department NCS / EMG Test Information for parents and carers.

Both tests are carried out by a Consultant Neurophysiologist (a medical professional who
specialises in the investigation of neurological disease to discover nerve activity and
neuromuscular damage).

How long will the test take?

The test will take about 45 minutes.

You are able to stay with your child throughout the test and a play specialist may be present to help occupy your child. Although we do have toys available, please feel free to bring your child’s favourite toy, book or hand held toy.

Are there any after effects?

There are no after effects. However the muscles tested may feel slightly sore for a short time afterwards.

After the test your child can go back to school or nursery.

When will we be advised of the results of the test?

The results of the test will be sent to your child’s consultant and you will receive them at your next outpatient appointment.

What will happen if I decide that my child will not have this test?

It may affect the management of your child’s condition.

Are there any alternatives to this procedure?

There are no alternative procedures

For further information

If you have any queries about the test or your appointment, please telephone the Neurophysiology Department on 0151 252 5375

This leaflet only gives general information. You must always discuss the individual treatment of your child with the appropriate member of staff. Do not rely on this leaflet alone for information about your child’s treatment.

This information can be made available in other languages and formats if requested.