Nerve Conduction Studies & Electromyography

What are they?

Nerve Conduction Studies
These are tests of the nerves in the hand, arms and legs, and occasionally elsewhere in the body. The studies are performed by passing small electric currents through the skin and making recordings of the natural electrical signals further down the nerve or over a muscle. This is usually done with pads attached to the skin and needles are not usually used. The electrical pulses produce a strange tingling sensation, which can be uncomfortable but should not be painful. Your muscles may have brief uncontrollable twitches. These tests take about 30 minutes. There are no after effects and after the investigation you will be able to go home or to work/school. The results of the investigation need to be analysed afterwards and a full report will be sent to the doctor who referred you for the test. Please inform the doctor or neurophysiologist if you have a pacemaker.

Electromyography
Depending on the nature of your problem, it may be necessary to record the naturally occurring electrical activity within your muscles. This is normally done with a fine needle inserted into the muscle. The small size of the needle means that if should not be too uncomfortable. As with all needles, this can sometimes leave a bruise, and the muscles may feel sore for a while after the test.

What preparation is needed?

It is helpful if your hands and feet are as warm as possible. Please avoid hand lotions or creams. Loose fitting clothing that can be rolled up to above the elbows and knees is very helpful. Bracelets, rings and watches will have to be removed for tests on the hands, and socks or tights removed for investigation on the feet. If you are on treatment you should take your tablets at the usual time.
If your have any questions about the issues raised about, or any other concerns, please talk to the doctor or neurophysiologist before the start of your test.